Electronic Configuration of Sodium

The video tutorial explains why the sodium ion (Na+) is smaller than the sodium atom (Na). It covers the process of forming Na+ by removing an electron from Na metal, leading to a change in electronic configuration. The tutorial details the electronic configurations of both Na and Na+ and discusses the reasons for the size reduction, including the effective nuclear charge and electron attraction.

What is the main topic discussed in the video?

• The size difference between Na+ ion and Na atom

• The properties of sodium metal

• The formation of Na+ ion

• The electronic configuration of sodium

How is Na+ ion formed from a sodium atom?

• By removing an electron

• By removing a proton

• By adding an electron

• By adding a neutron

What happens to the electronic configuration of sodium when it loses an electron?

• It gains an extra electron in the 2p orbital

• It loses an electron from the 3s orbital

• It gains an extra electron in the 3s orbital

• It loses an electron from the 2p orbital

What is the electronic configuration of Na+ ion?

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6 3s2

• 1s2 2s2 2p6

• 1s2 2s2 2p5

What is the electronic configuration of a neutral sodium atom?

• 1s2 2s2 2p5

• 1s2 2s2 2p6

• 1s2 2s2 2p6 3s1

• 1s2 2s2 2p6 3s2

Why does the size of Na+ ion become smaller than Na atom?

• Because it loses an electron and the effective nuclear charge increases

• Because it gains a neutron

• Because it loses a proton

• Because it gains an extra electron

What happens to the outermost orbital when Na atom loses an electron?

• It remains the same

• It disappears

• It gains an extra electron

• It becomes larger

What is the effective nuclear charge?

• The net negative charge experienced by protons

• The total charge of all neutrons in the nucleus

• The net positive charge experienced by electrons

• The total charge of all protons in the nucleus

How does the effective nuclear charge affect the size of Na+ ion?

• It makes the ion smaller

• It has no effect

• It makes the ion larger

• It makes the ion neutral

What happens to the remaining electrons when an electron is removed from a sodium atom?

• They move to a higher energy level

• They are pulled closer to the nucleus

• They are ejected from the atom

• They remain in the same position