Chemistry, 20.07.2019 19:00 gkasshy334

Which element can expand its valence shell to accommodate more than eight electrons? which element can expand its valence shell to accommodate more than eight electrons? o he n br?

Answers: 1

Show answers

Answers

According to octet rule, atoms with an atomic number less than 20 tend to combine with other atom such that both of these atoms have eight electrons in their valence shells, which gives them the same electronic configuration as that of noble gas.

However, there are few compound that donot obey octel rule. Among the elements mentioned above i.e. oxygen and helium obeys octet rule.

In case of nitrogen, oxide of nitrogen (like NO and NO2) have incomplete octet.

While there are few compounds of Br wherein Br has expanded octet. For example, in BrF5, Br has 12 electrons in valence shell.

Answer from: moses638

Br can expand its valence shell to accommodate more than eight electrons.

Explanation:

In a bond, elements tends to accommodate their valence electrons to reach the configuration of a noble gas (The Octet rule), so they try to complete their valence shell with 8 electrons, and they can do that only if they use the orbitals s (may contain only 2 electrons) and p (may contain only 6 electrons).

Sometimes, there are elements that need to share more than 8 valence electrons to use all the available electrons, but this is possible only if the atom has orbitals d (may contain 10 electrons) or f (may contain 14 electrons).

That's why only the elements that has a number 3 of period or more can expand its valence shell, because level 3 atoms has a d subshell.

In this case, He atom is in period number 1, N atom is in period number 2 and Br atom is in period number 3, that's why Br atom can expand its valence shell, and He and N atoms can't.

Answer from: Quest

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

Answer from: Quest

Alpha particles have positive charge, beta particles have negative charge, and answer 4 just doesn’t make sense. thus, you are left with only one possible answer.

Another question on Chemistry

Chemistry, 21.06.2019 19:00

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Answers: 1

Answer

Chemistry, 22.06.2019 06:20

What is a property of a double replacement reaction

Answers: 1

Answer

Chemistry, 22.06.2019 13:00

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

Answers: 1

Answer

Chemistry, 23.06.2019 03:20

What kind of intermolecular forces act between a hydrogen fluoride molecule and a hydrogen peroxide molecule? note: if there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.

Answers: 1

Answer

You know the right answer?

Which element can expand its valence shell to accommodate more than eight electrons? which element...

Questions