Review

What is the atomic mass of this element?

• 14

• Si

• Silicon

• 28.086

What subatomic particle/s are in the nucleus of an atom?

• Protons

• Electrons

• Protons and neutrons

• Electrons and neutrons

What is the charge on an electron?

• +1

• -1

• 0

Atomic radius increases across a period

• True

• False

Fluorine is the most electronegative atom in the periodic table. This means it...

• easily loses valence electrons

• has no attraction for shared electrons

• has a strong attraction for shared electrons

• will give electrons freely in ionic bonds

Sulfur is in main group 6. How many valence electrons will it have?

• 5

• 6

• 7

• 8

A Lewis dot diagram is used to show covalent bonds. A covalent bond is:

• Electrical force of attraction between cations (+) and anions (-)

• Electrical force of attraction between the nuclei of two atoms and one or more shared pairs of electrons

• Electrical force of attraction between metal cations and delocalised electrons

Which bonding types have atoms arranged in a lattice structure? (Select all that apply)

• Covalent molecular

• Covalent network

• Ionic

• Metallic

How many covalent bonds will phosphorous make?

• 2

• 3

• 4

• 5

Beryllium has 2 valence electrons. What ion would we expect it to form?