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aleksandrvk [35]
3 years ago
5

Sodium (na), atomic number 11, has a tendency to lose an electron in the presence of chlorine. after losing the electron, na has

________ protons in its nucleus.
Chemistry
1 answer:
Paha777 [63]3 years ago
3 0
Eleven because protons don’t leave.
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Write the full ground state electron configuration of f+.
ANTONII [103]

Answer:- 1s^22s^22p^4 .

Explanation:- Atomic number for fluorine(F) is 9 and it's electron configuration is 1s^22s^22p^5 . F^+ is formed when F loses one electron from it's valence shell.

F\rightarrow F^++1e^-

Second shell is the valence shell for fluorine and so it loses one electron from 2p to form  F^+  and the electron configuration of the ion becomes 1s^22s^22p^4 .


7 0
3 years ago
The effect of a catalyst on an equilibrium is to ________. Select one: a. increase the rate of the forward reaction only b. slow
Georgia [21]

Answer:

E

Explanation:

A catalyst is a substance which alters the rate of a chemical reaction. We check for the correctness of each of the options as follows:

A. Is wrong.

A catalyst can increase the rate of the forward and backward reaction

B. Is wrong

A catalyst does not slow the reverse reaction only. This particular case is the case of a negative catalyst

C is wrong

A catalyst has no effect on the equilibrium nor the equilibrium constant

D is wrong

Catalyst has no effect on equilibrium value

E is correct

Although Catalysts has no effect on equilibrium or its constant value, it can increase the the rate at which equilibrium is achieved by speeding up the reaction through bringing down the activation energy

5 0
3 years ago
Currently, radioactive waste is:
kaheart [24]
The answer is B....Brainliest?....
6 0
3 years ago
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If an electron falls from the n = 2 to the n = 1 energy levels in a Hydrogen atom what wavelength of light is emitted?
telo118 [61]

The wavelength is obtained as 122 nm. Option A

<h3>What is the wavelength?</h3>

We know that from the Bohr model of the atom, an electron can move from a higher energy level to a lower energy level or from a lower energy level to a higher energy level. This is the idea of energy quantization as put forward by Neill Bohr.

The wavelength can be obtained by the use of the formula;

1/λ = RH(1/n^2initial - 1/n^2 final)

λ = wavelength of the emitted light

RH = Rydberg's constant

n intial = initial energy level

nfinal = final energy level

Thus;

1/λ = 1.09 * 10^7(1/1^2 - 1/2^2)

1/λ = 1.09 * 10^7( 1 - 0.25)

λ = 122 nm

Learn more about the wavelength:brainly.com/question/13533093

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6 0
1 year ago
What is the ratio of Sr2+ ions to Br- ions in a neutral compound
neonofarm [45]

Answer: The ratio of Sr^{2+} to Br^{-1} is 1:2.

Explanation: A neutral compound is one which does not bear any charge. Thus to make a compound neutral, the amount of positive charge must be equal to the amount of negative charge.

Thus to balance Sr^{2+}, two molecules of Br^{-1}  are required. They combine to form strontium bromide (SrBr_2).

6 0
3 years ago
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