GCSE Chemistry - Chemical Bonding Assessment - UK

Surname

First name

The diagram shows the electron configuration for calcium. How can you write the electron configuration for calcium?

• 8,2,2,8
• 2,8,8,2
• 10,10
• 2,10,8

How many electrons does the outer shell of a lithium atom contain?

• 1
• 3
• 4
• 7

Electrons are ____________ charged.

• positively

• neutrally

• negatively

When atoms lose or gain electrons and become charged, we call them:

• an isotope

• a new atom

• an ion

• a bond

An atom that loses an electron forms a positive ion.

• a positive

• a negative

• neither

Sodium forms an ionic bond with Chlorine. What is the charge on the Sodium ion?

• -2

• +1

• -

• +

Answer explanation

The charge on the Sodium ion is indicated by a positive sign (+) in an ionic bond with Chlorine.

Ionic bonding happens between a metal and a non-metal.

• metals

• non-metals

• a metal and a non-metal

Answer explanation

Ionic bonding occurs between a metal and a non-metal, making the correct answer choice 'a metal and a non-metal'.

Covalent bonding happens between:

• metals

• non-metals

• a metal and a non-metal

Answer explanation

Covalent bonding occurs between non-metals, where atoms share electrons to achieve a stable electron configuration.