All categories

3 years ago

Which of the following electron configurations correspond to an atom with an electron in an excited state?

Chemistry

1 answer:

ryzh [129]3 years ago

7 0

The correct answer is option (B) [Ne]3s¹3p⁶.

The electron configuration of Cl is [Ne]3s²3p⁵ in the ground state.

The electron configuration of Cl is [Ne]3s¹3p⁶ in the excited state.

In the excited state one electron from the 2s orbital jumps to the 2p orbital. As a result the 2p orbital becomes completely filled with 6 electrons and the 2s orbital is partially filled with only 1 electron. To be completely filled a p and a s orbital can have a maximum of 6 and 2 electrons respectively.

Thus [Ne]3s¹3p⁶ electron configuration correspond to an atom with an electron in an excited state.

You might be interested in

A student titrated a solution containing 3.7066 g of an unknown Diprotic acid to the end point using 28.94 ml of 0.3021 M KOH so

uranmaximum [27]

Answer:

Molar mass of the diprotic acid is 424 grams

Explanation:

[hint: diprotic acid only contains 2 hydrogen protons]

Ionic equation:

${ \bf{2OH { }^{ - } _{(aq)} + 2H { }^{ + } _{(aq)}→ 2H _{2} O _{(l)} }}$

first, we get moles of potassium hydroxide in 28.94 ml :

${ \sf{1 \: l \: of \: KOH \: contains \: 0.3021 \: moles}} \\ { \sf{0.02894 \: l \: of \: KOH \: contain \: (0.02894 \times 0.3021) \: moles}} \\ { \underline{ = 0.008743 \: moles}}$

since mole ratio of diprotic acid : base is 2 : 2, moles are the same.

Therefore, moles of acid that reacted are 0.008743 moles.

${ \sf{0.008743 \: moles \: of \: acid \: weigh \: 3.7066 \: g}} \\ { \sf{1 \: mole \: of \: acid \: weighs \: ( \frac{1 \times 3.7066}{0.008743}) \: g }} \\ = { \underline{423.95 \: g \approx424 \: grams}}$

for the molar mass:

8 0

3 years ago

Which of the following choices identifies the forms of mechanical energy?

WITCHER [35]

Kinetic and potential energy would be the correct answer to your question

3 0

4 years ago

Which describes the letter that belongs where the question mark is?

Evgesh-ka [11]

Explanation:

Are you referring to a variable?

4 0

3 years ago

Read 2 more answers

Write the full unabbreviated electrons configuration of the following elements

I am Lyosha [343]

Answer:

Explanation:

Sodium:

Na₁₁ = 1s² 2s² 2p⁶ 3s¹

Iron:

Fe₂₆= 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

Bromine:

Br₃₅ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵

Barium:

Ba₅₆ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s²

Cobalt:

Co₂₇ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷

Silver:

Ag₄₇ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d¹⁰

Tellurium:

Te₅₂= 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁴

Radium:

Ra₈₈ = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s²

7 0

4 years ago

Which noble gas has the same electron configuration as the oxygen in a water molecule?

OverLord2011 [107]

Neon is a noble gas and has the same noble gas as an oxygen in a water molecule.

5 0

3 years ago