Atomic structure

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

How many neutrons does this atom of carbon have?

Carbon 14's square from the periodic table. The mass number (14) is top-left. The atomic number (6) is bottom-left.

9

What are isotopes?

10

Hydrogen has three isotopes and a relative atomic mass of 1.0079. Which isotope is the most abundant?