Period 3 and group 2

Chlorine is a strong .................... agent. It ......................

• oxidising, reacts slowly with oxygen

• reducing, reacts slowly with oxygen

• oxidising, has no reaction with oxygen

• reducing, has no reaction with oxygen

Which element forms an amphoteric oxide?

• Sodium

• Magnesium

• Aluminium

• Silicone

Which element forms a basic oxide?

• Sodium

• Aluminium

• Silicone

• Phosphorus

Which element forms an acidic oxide?

• Sodium

• Magnesium

• Aluminium

• Silicon

When across a period, the atomic size decreases so the first IE ___________.

• increases

• decreases

• constant

Factors affecting the ionisation energy:

• Atomic radius

• nuclear charge

• Shielding effect

• All of the above

Arrange the following in order of increasing ionisation energy: Sodium, Oxygen, Boron

• Sodium, Boron, Oxygen

• Oxygen, Boron, Sodium

• Sodium, Oxygen, Boron

• Oxygen, Sodium, Boron

What elements have zero electronegativity?

• metals

• non metals

• metalloids

• noble gases

Which oxide of an element dissolves in water to form acidic solution

• Sodium

• Magnesium

• Silicon

• Phosphorus

Which oxide of Period 3 elements shows both acidic and basic properties?

• MgO

• Al₂O₃

• SiO₂

• ClO₂