Atomic structure and properties relating to bonding

1

What is the centre of an atom called?

2

What is the charge on an electron?

3

Which of the three sub-atomic particles is the lightest?

4

If atoms contain charged particles, why do they not have a charge?

5

What is the atomic number of an atom equal to?

6

Where are the electrons inside an atom?

7

Which elements have similar chemical properties?

8

What name is Group 7 of the periodic table known by?

9

Sodium and chlorine react together to form the compound sodium chloride. How are sodium and chlorine held together in this compound?

10

Which elements are found in the compound calcium carbonate?