Answer:
The answer to this question is given below in the explanation section.
Explanation:
The Bohr model depicts an atom as a small, positively charged nucleus surrounded by electrons.These electrons travel in circular orbit around the nucleus similar in structure to the solar system,except electrostatic forces rather than gravity provide attraction.Electron orbit around the nucleus resembles that of planets around the sun in the solar system.
The Bohr model was an improvement on the earlier cubic model(1902),the plum pudding model(1904) the saturnine model (1904) the rutherford model (1911) since the Bohr model is a quantum physics based modification of the Rutherford may source combine the two:the Rutherford-Bohr model
Although revolutionary at the time,the Bohr model is a relatively primitive model of the hydrogen atom compared to the valence shell atom.As an initial hypothesis it was derived as a first order approximation to describe the hydrogen atom.Due to its simplicity and correct results for selected systems.
In 913 Bohr suggested that electrons could only have certain classical motions:
Electrons in atoms orbit the nucleus.The electrons can only orbit stably,without radiating in certain orbits at a certain discrete set of distances from the nucleus.These orbit are associated with definite energies and are also called energy shells or energy levels.Electrons can only gives or lose energy by jumping from one allowed orbit to another,absorbing or emitting electromagnetic radiation with a frequency (v) determined by the energy difference of the levels according to the plank relation.. The atoms are held together because they both pull on the ________________ electrons
Answer:
negative and positive i think
Explanation:
what is observed when an iron bar is dipped into a solution of silver nitrate
Answer:
I think it will start to have a greenish color and get lighter
Explanation:
PLEASE HELP ASAP I NEED HELP I LOVE YOU THIS IS URGENT PLEASE MY CLASS ENDS IN LIKE A DAY AND A HAVE 3 UNITS LEFT
Answer:
B: Hemoglobin
Explanation:
that's the answer
Answer:
B.Hemoglobin
Explanation:
Hemoglobin is the red color pigment that gives the color to your blood. Its found in the RBC's [Red Blood Cells]. Its main function is to bind completely with oxygen, due to the presence of iron in it, that helps it to get transported to various parts of the body according to its necessity through blood.
2. Why do ions form?
Answer:
When atoms lose or gain electrons, they become positively or negatively charged ions. In an ionic compound, the ions are arranged in a three-dimensional structure called a crystal. ... When an atoms gains or loses electrons, it gains a charge, thus becoming an ion.
Explanation:
Answer:
The iron ore deposits began forming when the first organisms capable of photosynthesis began releasing oxygen into the waters.
Explanation:
when will condensation occur?
A. When the humidity equals the relative humidity
B. When sublimation does not occur
C. When the relative humidity drops below 50 percent
D. When the temperature drops below the dew point
Answer:
d
Explanation:
A circuit is a path along which electric current flows. How would changing the battery in a circuit from 9 volts to 1.5 volts most likely affect the circuit? More electric charge would flow in the circuit. Less electric charge would flow in the circuit. The resistance in the circuit would decrease. The resistance in the circuit would increase.
Answer:
A wave passes from a solid to a liquid while remaining the same temperature.
The medium increases in temperature while remaining in the same phase.
The medium decreases in temperature while remaining in the same phase.
A wave passes from a liquid to a gas while remaining the same temperature.
AND less electric charge would flow in the circuit
The voltage is decreased
Explanation:
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Changing the battery in a circuit from 9 volts to 1.5 volts would most likely result in less electric charge flowing in the circuit.
What is Ohm's law ?According ohms law, the electric voltage is the product of current and resistance in the circuit. A lower voltage battery will have less electric potential energy available to move the charges, resulting in a lower electric current flow in the circuit.
The resistance in the circuit would not necessarily increase or decrease due to the change in the battery voltage. Resistance is a property of the components in the circuit, such as resistors, wires, and other devices that can impede the flow of current.
However, if the resistance of the circuit remains the same and the battery voltage decreases, the resulting electric current flow would also decrease according to Ohm's law (I = V/R), where I is the current, V is the voltage, and R is the resistance.
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If you put an egg on a plate will it melt ?? Im confused
In the diagram of a transverse wave shown, what does M represent?
Transverse Wave
P=1cycle per second
A. Wavelength
B. Frequency
C. Amplitude
D. Rest positions
In the diagram of a transverse wave, P = 1 cycle per second, M represent wavelength. Therefore, option A is correct.
What is transverse wave ?A wave is considered to be transverse if its oscillations run counterclockwise to the wave's direction of advance. A longitudinal wave, on the other hand, moves in the direction of its oscillations. Transverse waves include water waves.
Due to the shear stress produced, transverse waves are frequently observed in elastic solids; in this situation, the oscillations are caused by the displacement of the solid particles from their relaxed state in directions perpendicular to the wave's propagation.
Trough: A transverse wave's lowest point. The distance separating one transverse wave's peak from the next is known as the wavelength. The distance from the wave's resting position to its crest is its amplitude.
Thus, option A is correct.
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Draw the structure of 2-bromo, 3-chloro-4,4-dimethyl
Answer:
The compound you are asking for is not complete. But I will give you the answer to one of the compounds.
The complete compound is:
2-bromo, 3-chloro-4,4-dimethylpentane.
Attached is the structure of the compound.
Explanation:
2-bromo, 3-chloro-4,4-dimethylpentane is an organic compound. It's molecular formula is C₇H₁₄BrCl.
This compound has bromine and chlorine attached to the backbone carbon of the pentane compound. The bromine and chlorine are attached to the second and third backbone carbon of the compound respectively.
Also, the dimethyl means that the compound has two methyl (CH₃) attached to the same carbon which is the number 4 backbone carbon.
differentiate between stream load stream discharge and stream gradient
Answer:
Differentiated below
Explanation:
- Stream load is defined as the quantity of solid matter that's carried by the erosion of the stream.
- Stream discharge is defined as the quantity (which is volume) of water that passes a given point for a particular amount of time.
- Stream Gradient is defined as the slope of the stream. This is basically expressed as:
Stream gradient = Change in elevation between two points on a stream ÷ actual distance between the two points where water actually flows.
What occurs as the atomic number of the elements in Period 2 increases?
1)The nuclear charge of each successive atom decreases, and the atomic radius decreases.
2)The nuclear charge of each successive atom decreases, and the atomic radius increases.
3)The nuclear charge of each successive atom increases, and the atomic radius decreases
4)The nuclear charge of each successive atom increases, and the atomic radius increases.
Answer:
3)The nuclear charge of each successive atom increases, and the atomic radius decreases
Explanation:
As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.
When iso-propanol burns in oxygen, carbon dioxide and water are produced
Explanation:
When liquid isopropanol (C3H8O) burns in oxygen gas, carbon dioxide gas and liquid water are produced. When dissolved sodium hydroxide reacts with sulfuric acid, aqueous sodium sulfate and water are formed.
Can someone answer these two separate questions pls ill give brainliest
The average speed
3. 89.7 m/min
4. 6.13 ft/min
Further explanationGiven
3. 1076 m in 12 min
4. 92 ft in 15 min
Required
average speed
Solution
3.
I am solving for : the average speed
The equation I need is :
[tex]\tt avg~speed=\dfrac{total~distance}{total~time}[/tex]
This is how I set the equation
[tex]\tt avg~speed=\dfrac{1076~m}{12~min}[/tex]
This is my answer = 89.7 m/min
4.
I am solving for : the average speed
The equation I need is :
[tex]\tt avg~speed=\dfrac{total~distance}{total~time}[/tex]
This is how I set the equation
[tex]\tt avg~speed=\dfrac{92~ft}{15~min}[/tex]
This is my answer = 6.13 ft/min
Na2SO3 + S -------> Na2S2O3
Answer:
Synthesis
Explanation:
A+B=C
3 A student investigates how the concentration of an acid affects the speed of reaction with a 0.5
D filtration
mass of magnesium at 30°C.
The student has a beaker, concentrated acid, water and the apparatus below.
P a balance
Qa dock
R a measuring cylinder
S a thermometer
Which pieces of apparatus does the student use?
A P, Q and R only
B P, Q and S only
C Q, R and S only
DP, Q, R and S
Answer:
C Q, R and S only.
Thermometer: for measuring temperature.
Measuring cylinder: for measuring accurate volume used in standardization during determination of concentration.
dock: for holding solutions
Indicate which one of the two species is larger
A. Mg2+ or Ca2+
Answer:
Ca2+ is larger than Mg2+
Explanation:
Mg2+ has total 10 electrons and Ca2+ has total 18 electrons. So, Ca2+ will have more no of subshell which means greater particle size.
How is light energy converted to chemical energy?
Answer:
Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.
Explanation:
Answer:
Photosynthesis is the process in which light energy
Explanation:
Based on the reactivities of the elements involved, which reaction will form products that are more stable than the reactants?
Answer:
Exothermic reaction
Explanation:
Since in an exothermic reaction heat is released, the products will be more stable than the reactants.
(HELP FAST )The model shows a molecule of silk made by a spider.
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1/4th of a sample of thorium-232 remains.
How long has the sample been decaying?
Answer:
I believe it is 42.3 billion years old
Explanation:
Calculate the number of moles in 125g of Copper (II) Hydroxide. URGENT!
Answer:
1.28 mol Cu(OH)₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
125 g Cu(OH)₂
Step 2: Identify Conversions
Molar Mass of Cu - 63.55 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of H - 1.01 g/mol
Molar Mass of Cu(OH)₂ - 63.55 + 2(16.00) + 2(1.01) = 97.57 g/mol
Step 3: Convert
[tex]125 \ g \ Cu(OH)_2(\frac{1 \ mol \ Cu(OH)_2}{97.57 \ g \ Cu(OH)_2} )[/tex] = 1.28113 mol Cu(OH)₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
1.28113 mol Cu(OH)₂ ≈ 1.28 mol Cu(OH)₂
4) 300cm of Hydrogen chloride gas were passed over 7.0g of heated iron fillings until there was no further
change. The reaction vessel was then allowed to cool to room temperature. Use the equation below to
determine the mass of iron that remained at the end of the experiment (molar gas volume = 24000cm"; Fe=56).
Fe(s) + 2HCl(g) → FeCl2(s) + H2(g)
(3 mks)
50
3 of IM colution calcium chloride (Avogadro's
The mass of iron that remained at the end of the experiment : 6.65 g
Further explanationGiven
V HCl gas = 300 cm³
mass Fe = 7 g(Ar Fe = 56 g/mol)
Reaction
Fe(s) + 2HCl(g) → FeCl2(s) + H2(g)
Required
The mass of iron remained
Solution
molar volume for 1 mol gas = 24000 cm³=24 L, so mol HCl :
[tex]\tt \dfrac{300}{24000}=0.0125~mole[/tex]
mol ratio Fe : HCl from equation : 1 : 2, so mol Fe =
[tex]\tt \dfrac{1}{2}\times 0.0125=0.00625[/tex]
mass of Iron(reacted) :
[tex]\tt 0.00625\times 56=0.35~g[/tex]
Mass remained
7 g - 0.35 = 6.65 g
What do elements in a group on the periodic table have in common?
Answer:
They have similar chemical properties.
Explanation:
james madison test
The elements in a group on the periodic table have in common that they all are arranged on the basis of the number of electrons in the outer most shell of the atom.
What is periodic table?The periodic table of elements is defined as in which the classified all the non metals accordance with their properties in such a way that with similar properties are grouped.
Moosley arranged the elements in increasing order of their atomic number and observed that after a certain time of interval elements with same properties are repeated.
Therefore, elements in a group on the periodic table have in common that they all are arranged on the basis of the number of electrons in the outer most shell of the atom.
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OxYgen and hydrogen particles are kept in a container. Which of the following
accurately describes diffüsion of these gases?
OOxygen and hydrogen particles concentrate at the center of the container.
Oxygen particles move to one corner of the container and hydrogen particles go
to the opposite corner
DOxygen particles and hydrogen particles repel each other.
O Oxygen particles mix evenly with hydrogen particles.
Answer:
Option D
Oxygen particles mix evenly with hydrogen particles.
Explanation:
Diffusion refers to the movement of gasses from a region of higher concentration to a region of lower concentration.
Diffusion occurs in gases because their particles are in a state of constant random motion.
Due to this continuous random motion, once the oxygen and the hydrogen are added to the container, they will begin to mix freely with each other until they fill up the entire volume of the container.
What is the wavelength of a wave with energy equal to 1.528 x 10-13 J? E=hc/LaTeX: \lambdaλ Energy= Measured in Joules h=Plank's constant, 6.626 x 10-34 J x s c=speed of light, 3.00 x108 m/s LaTeX: \lambdaλ= wavelength in meters Group of answer choices 1.301 x 1029 m 6.918 x 1028m 6.918 x 10-13m 1.301 x 10-12m
Answer:
1.301 × 10⁻¹² m
Explanation:
Step 1: Given and required data
Energy of the electromagnetic wave (E): 1.528 × 10⁻¹³ JPlanck's constant (h): 6.626 × 10⁻³⁴ J . sSpeed of light (c): 3.00 × 10⁸ m/sStep 2: Calculate the wavelength (λ) of the electromagnetic wave
We can calculate the wavelength of the electromagnetic wave using the Planck-Einstein's relation.
E = h × c / λ
λ = h × c / E
λ = (6.626 × 10⁻³⁴ J . s) × (3.00 × 10⁸ m/s) / 1.528 × 10⁻¹³ J
λ = 1.301 × 10⁻¹² m
The wavelength of this wave is equal to: D. [tex]1.301 \times 10^{-12}\;meter[/tex]
Given the following data:
Energy = [tex]1.528 \times 10^{-13} \;Joules[/tex]Plank's constant = [tex]6.626 \times 10^{-34}\;Js[/tex]Speed of light = [tex]3 \times 10^8\;m/s[/tex]To determine the wavelength of this wave, we would apply Einstein's equation for photon energy:
Mathematically, Einstein's equation for photon energy is given by the formula:
[tex]E=\frac{hc}{\lambda}[/tex]
Where:
E is the energy. h is Plank's constant.[tex]\lambda[/tex] is the wavelength.c is the speed of light.Making [tex]\lambda[/tex] the subject of formula, we have:
[tex]\lambda = \frac{hc}{E}[/tex]
Substituting the given parameters into the formula, we have;
[tex]\lambda = \frac{6.626 \times 10^{-34}\; \times \;3.0 \times 10^{8}}{1.528 \times 10^{-13} }\\\\\lambda = \frac{1.99 \times 10^{-25}}{1.528 \times 10^{-13} }\\\\\lambda =1.301 \times 10^{-12}\;meter[/tex]
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What is the general trend for electron affinity values going across a period?
Answer:
increase.
Explanation:
as you cross the period the atomic size decrease makes the atoms to have more affinity to the coming electrons.
plzz help this is timed! true or false/Continental air masses are cold. Maritime air masses are hot.
Answer:
False.
Explanation:
How many seconds are in 209.7 ms?
Answer:0.21 seconds
Explanation:
Just because it is and how science works
Answer:
0.21 seconds, please let me know if I am wrong
F
19.00
Fluorine
Using the information on the figure above, report the atomic number and atomic mass of fluorine.
Answer:
From the periodic table, Atomic number of fluorine is 7 and atomic mass is 19
What happens when the number of electrons and protons inside of an atom are Not equel?
Hello, It's me Moriah Elizabeth!
Answer:
When the number of electrons does not equal the number of protons, the atom is ionized.