Stogs GCSE Interleaving Bonding S

A covalent bond is:

• A shared electron

• A strong electrostatic force of attraction between ions

• A strong electrostatic force of attraction between atoms

• A shared pair of electrons

A single line drawn between two atoms represents:

• A single covalent bond

• A single electron

• A shared pair of electrons

• A single proton

How many covalent bonds are there in a single molecule of oxygen, $O_2$   ?

• 1

• 2

• 3

• 4

A covalent bond is strong because:

• There are strong electrostatic forces of attraction between the atoms.

• There are strong electrostatic forces of attraction between the shared electron pair and the two bonding nuclei.

• Electrons are strong.

• Electron pairs are strong.

An anion is:

• An onion which has gone bad.

• A positive ion.

• A negative ion.

• A molecule.

An atom becomes an ion by:

• Losing or gaining protons.

• Losing or gaining neutrons.

• Losing or gaining electrons.

• Losing or gaining mass.

A compound with an -ate ending:

• Contains oxygen only.

• Contains sulphur.

• Contains oxygen in addition to two other elements.

• Contains nitrogen.

What ion is formed when sulphur reacts to become part of an ionic compound?

• 1+

• 2+

• 2-

• 1-

What is the sulphate ion?

• S^2-

• S²⁺

• SO₄^2-

• SO₄²⁺

Ionic compounds are strong because they are held together by:

• Covalent bonds

• Ionic bonds

• Strong electrostatic forces of attraction between oppositely charged ions.

• Strong electrostatic forces of attraction between electrons.