The temperature at which a solid changes to a liquid is called the

• Freezing point

• Melting point

• Boiling point

A substance has a melting point of -10 0C and a boiling point of 30 0C. What state is it in at -17 0C?​

• Solid

• Liquid

• Gas

When atom loses or gains electrons they develop

• energy

• a charge

• extra protons

When an atom loses electrons it becomes a

• positively charged ion

• negatively charged ion

• an atom with no net charge

How many electrons does oxygen gain to become a negatively charged ion?​

• 1

• 2

• 3

• 4

Group 7 Halogens have 7 electrons in their outer shell, when the halogen gains an electron it has a charge of

• +1

• -1

• +2

• -2

Ionic bonding occurs between a

• Compounds

• Metals

• Metals and non-metals

• Non-metals

Which is the correct definition of a covalent bond?

• electrons shared between atoms to make compounds

• electrons moved between atoms to make molecules

• electrons shared between compounds to make molecules

• electrons shared between atoms to make molecules. ​

Simple covalent molecules have low melting points because they have

• Strong covalent bonds

• Weak intermolecular forces

• Strong intermolecular forces

• Weak covalent bonds

Diamond is an example of a

• simple covalent molecule

• giant covalent structure

• ionic compound

• giant ionic lattice