Sub Shells

What is the maximum number of electrons that can be held in a single orbital?

• 1

• 2

• 3

• 4

What is the maximum number of electrons allowed in the third electron shell (n=3)?

• 2

• 8

• 18

• 32

How many orbitals are present in a 'd' subshell?

• 1

• 3

• 5

• 7

An element in Period 4 of the periodic table has how many electron shells?

• 1

• 2

• 3

• 4

How many orbitals are present in a 'd' subshell?

• 1

• 3

• 5

• 7

Which of the following represents the correct order of filling subshells according to increasing energy?

• 1s, 2s, 2p, 3s, 3p, 3d

• 1s, 2s, 2p, 3s, 3p, 4s

• 1s, 2s, 3s, 2p, 3p, 4s

• 1s, 2s, 2p, 3p, 3s, 4s

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What is the electron configuration for Beryllium (Be), which has 4 electrons?

• 1s² 2s¹ 2p¹

• 1s² 2s²

• 1s² 2p²

• 1s¹ 2s² 2p¹

What is the electron configuration for a neutral Nitrogen atom?

• 1s² 2s² 2p²

• 1s² 2s² 2p³

• 1s² 2s² 2p⁴

• 1s² 2s² 2p⁵

What is the electron configuration for a neutral Scandium (Sc) atom?

• [Ar] 4s² 3d¹

• [Ar] 3d¹ 4s²

• [Ar] 4s¹ 3d²

• [Ar] 3d² 4s¹