Periodic Table - Grp 0

Question 1

grp 0

• they are called _____ (2)
• Their atoms have ____ ____ shells (___ or ____ structure) and they are ____ (exist as single, unbonded atoms)

Answer 1

• noble gases, inert gases
• complete, valence
  duplet, octet
  monoatomic

Question 2

physical properties of group 0 (1)

Answer 2

1. very low mp/bp

Question 3

trends down group 0 (1)

Answer 3

1. mp/bp increase

– density increase

Question 4

reason for trends of grp 0 – physical properties

Answer 4

• relative atomic mass increase
• stronger intermolecular forces between the atoms
• more energy required to overcome the intermolecular forces
• hence. mp/bp increase

Question 5

chemical properties of grp 0 (1)

Answer 5

1. • already has noble gas configuration and fully filled valence shell
   • do not need to gain/lose or share
     electrons: their oxidation state is 0.
   • hence, do not undergo any chemical reaction.

Question 6

uses of grp 0 gases

He Ne Ar

Answer 6

Helium: reddish glow
- used to fill airships and
weather balloons

Neon: orange glow
- used to make/fill advertising
lights

Argon: blue glow
- used to fill light bulbs.