Ions and Electron Configuration

What is the electron configuration of Ca⁺²?

• 1s2 2s2 2p6 3s2 3p6 4s2

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6 3s2 3p6 4s4

• 1s2 2s2 2p6 3s2 3p6 4s2 4p2

The Ca+2 ion is isoelectronic with what -1 ion?

• F-1

• Cl-1

• Br-1

• K-1

• Ar-1

Which of the following are isoelectronic with O^-2 ion?

• Flourine

• Mg+1

• Flouride

• Nitride

• Neon

Why do atoms become ions in the first place?

• They prefer to be charged

• They all want to be positive

• They all want to be negative

• They want to have their valence shell full

1s2 2s2 2p6 is the electron configuration of which ION?

• Aluminum

• Chloride

• Beryllium

• Boron

• Neon

What is the electron configuration of the Sc+2 ion? (Element #21).

• 1s2 2s2 2p6 3s2 3p6

• 1s2 2s2 2p6 3s2 3p6 3d2

• 1s2 2s2 2p6 3s2 3p6 4s2

• 1s2 2s2 2p6 3s2 3p6 4s2 3d2

Which levels do electrons get removed from first, when they are lost?

• 1st level

• outer levels

• valence shells

• s and p levels

• d levels

What is the electron configuration of the Sn+3 ion? (element #50)

• 1s2 2s1

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d9

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p2

• 1s2 2s2 2p6 3s2 3p6 4s2 4d10 4p6 5d10

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d10