C1 - Group 1 (part 1)

What is the name of group 1 elements?

Alkali metals

How many electrons do group 1 metals have in their outer energy level?

1

Are group 1 metals soft or hard?

Soft

What happens to group 1 metals when they are freshly cut?

They react rapidly with oxygen in the air

What compound is formed when lithium reacts with oxygen?

Lithium oxide

What compound is formed when sodium reacts with oxygen?

Sodium oxide

What compound is formed when potassium reacts with oxygen?

Potassium oxide

Why does reactivity increase as you go down group 1?

The outer electron is further from the nucleus and more easily lost

What happens to lithium's outer electron when it reacts with oxygen?

It is transferred to an oxygen atom

What ion does lithium become after reacting with oxygen?

Li⁺ (lithium ion with +1 charge)

What ion does oxygen become after reacting with lithium?

O²⁻ (oxide ion with -2 charge)

Why does lithium form a +1 ion?

It loses one electron and has more protons than electrons

Why do all group 1 metals react similarly with oxygen?

They all have one outer electron

Do group 1 metals react with chlorine?

Yes

What group is chlorine in on the periodic table?

Group 7

What happens when lithium reacts with chlorine?

Lithium transfers its outer electron to chlorine

What compound is formed when lithium reacts with chlorine?

Lithium chloride

Why do all group 1 metals react similarly with chlorine?

They all have one electron to lose and form similar ions

What is the trend in reactivity of group 1 metals with chlorine as you go down the group?

Reactivity increases

Why does reactivity increase down group 1 with chlorine?

The outer electron is more easily lost as it's further from the nucleus

What charge do group 1 metal ions always have?

1

What type of bonding is formed when group 1 metals react with non-metals like oxygen or chlorine?

Ionic bonding

What type of compound is formed when group 1 metals react with oxygen or chlorine?

Ionic compound

Why do group 1 metals form positive ions?

Because they lose their one outer electron

Why do oxygen and chlorine form negative ions?

Because they gain electrons