This question is about the element magnesium.
Use words from the box to complete the sentences about magnesium. Each word may be used once, more than once, or not at all.
| electrons | negative | neutral | neutrons |
| nucleus | positive | protons | shells |
An atom of magnesium has a central
that contains particles called
and
. Around these particles there are
orbiting in
.
An atom of magnesium has no charge because it contains equal numbers of
and
.
The particles with the lowest mass in an atom of magnesium are called
.
Magnesium forms a compound with the formula Mg(NO3)2\text{Mg(NO}_3)_2Mg(NO3)2.
How many different elements are there in Mg(NO3)2\text{Mg(NO}_3)_2Mg(NO3)2?
What is the total number of atoms in the formula Mg(NO3)2\text{Mg(NO}_3)_2Mg(NO3)2?
