Calcium Atom Electron Configuration

The video tutorial explains the electron configuration of calcium and its cation Ca2+. It begins with the configuration of neutral calcium, detailing its protons and electrons. The tutorial then covers energy levels and the Lewis dot diagram. It explains how calcium forms a cation by losing two electrons, resulting in a stable configuration similar to the noble gas krypton. This process gives calcium a full outer shell, making it stable.

What is the total number of protons in a neutral calcium atom?

• 20

• 22

• 18

• 24

How many electrons are present in the first energy level of a neutral calcium atom?

• 4

• 2

• 1

• 6

What is the total number of electrons in the second energy level of a neutral calcium atom?

• 8

• 4

• 6

• 2

Which energy level loses electrons when calcium forms a Ca2+ cation?

• Third

• First

• Second

• Fourth

What charge does calcium have after losing two electrons?

• +1

• +2

• -1

• -2

What happens to the 4s2 electrons in the electron configuration of calcium when it forms Ca2+?

• They remain unchanged

• They double

• They are lost

• They are gained

Which noble gas has the same electron configuration as Ca2+?

• Krypton

• Xenon

• Neon

• Argon

What is the significance of having a noble gas electron configuration?

• It is very stable

• It is more reactive

• It has more electrons

• It is less stable

How many valence electrons does Ca2+ have after losing two electrons?

• 8

• 4

• 2

• 0

Why is the electron configuration of Ca2+ considered stable?

• It has more protons

• It has a full outer shell

• It is more reactive

• It has fewer electrons