Electron Shells & Ions - Intro to Back to Basics (1.2)

Question 1

Why are atoms electronically neutral?

Answer 1

no. of electrons = no. of protons
The charge of neutrons is neutral
Therefore, the overall charge of the atom is neutral

Question 2

Describe the way in which electron shells fill

Answer 2

• From lowest energy level (closest to the nucleus) to highest energy
• Place electrons as far apart as possible
• Place electron singularly, then pair

Question 3

What is the term used to describe the electrons in the outer shell?

Answer 3

Valence electrons

Question 4

Define ionisation

Answer 4

It occurs when an atom loses or gains an electron to become a positively or negatively charged ion

Question 5

What is the name of N^3- ion?

Answer 5

Nitride ion