Chapter 12: The Periodic Table

Question 1

General properties of periodic table (not test, its just info)

Answer 1

1. The elements are arranged in order of proton numbers
2. Vertical column is know as a group
3. Horizontal row is known as a period

Question 2

Group I Metals (not test, its just info)

Answer 2

• Groups I metals are also known as alkali metals
• They are unusal metals

Question 3

Physical properties of Group I Metals (Like other groups)

Answer 3

1. Good conductors of elctricity
2. Good conductors of heat
3. Malleable (can be bent without breaking)
4. Ductile (Can be pulled and made into wired)

Question 4

Physical properties of Group I Metals (Unlike other groups)

Answer 4

1. Soft and can be easily cut with a knife
2. Have low melting points
3. Have low boiling points
4. Have low densities (Some float on water)

Question 5

Chemical properties of Group I

Answer 5

Group I metals react with water to form alkalis (metal hydroxide) and hydrogen gas

Question 6

Trends in physical properties going down Goup I

Answer 6

1. Melting point decreases
2. Boiling point decreases
3. Density increases

Question 7

Trends in chemical properties going down Group I

Answer 7

1. Reactivity increases

Question 8

Gourp VII (Halogens)

Answer 8

• Group VII are non-metals also known as halogens
• They are toxic non-metals

Question 9

Physical properties of Group VII

Answer 9

1. Poor conductors of electricity
2. Poor conductors of heat
3. Coloured elments

Question 10

Colours of Grop VII

Answer 10

Fluorine: Pale yellow (g)
Chlorine: Greenish yellow (g)
Bromine: Reddish brown (L)
Iodine: Grey(s)

Question 11

Trends in physical properties going down Group VII

Answer 11

1. Melting point increases
2. Boiling point increases
3. Density increases

Question 12

Trend in chemical property going down Group VII

Answer 12

1. Reactivity decreases