IMAT 2020 Chemistry

What does the formula Br₂ represent?

• a compound of the element bromine

• two separate atoms of the element bromine

• a molecule of the element bromine

• a molecule of the compound bromine

• two bromide ions

An atom has atomic number x and a mass number of 2x + 6.

How many neutrons are in the nucleus of this atom?

• 6

• x – 6

• x + 3

• x + 6

• x – 3

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