Atomic Structure

What is the relative charge of a proton?

• 1
• 3
• 1
• 2

How many electrons are present in a sodium atom?

• 10
• 11
• 12
• 13

What is the relative atomic mass of sodium?

• 22.0
• 22.9
• 23.0
• 23.1

Which element's electron configuration ends in 3s2 3p4?

• Sulphur
• Phosphorus
• Chlorine
• Argon

How many orbitals does the p subshell have?

• 1
• 2
• 3
• 4

What is the maximum number of electrons that can occupy a single orbital?

• 1
• 2
• 3
• 4

What is the electron configuration of oxygen?

• 1s2 2s2 2p3
• 1s2 2s2 2p4
• 1s2 2s2 2p5
• 1s2 2p6

What is the correct order of filling for subshells?

• 1s 2s 2p 3s 3p 4s 3d 4p
• 1s 2s 2p 3s 3p 3d 4s 4p
• 1s 2s 2p 3s 3p 3d 4p 4s
• 1s 2s 3s 2p 3p 4s 3d 4p

What is the shorthand electron configuration for titanium?

• [Ar] 4s2 3d2
• [Ne] 3s2 3p6 4s2
• [Ar] 4p2
• [Ne] 3s2 3p6

Which subshell is filled after 4s?

• 3p
• 4p
• 3d
• 4d