Atomic structure and the periodic table

What you'll learn

1. 1

   Imagine an atom is like a tiny solar system. At the centre is a nucleus (the sun), and tiny electrons zoom around it like planets!

2. 2

   What is at the centre of an atom?

3. 3

   Here's a simple atom: 2 protons and 2 neutrons in the nucleus, with 2 electrons in a shell around it.

4. 4

   Let's find the element with 3 protons on the periodic table.

5. 5

   Build a lithium atom: drag the right number of protons, neutrons, and electrons.

6. 6

   An atom has 6 protons. Which element is it? (Hint: atomic number = number of protons)

7. 7

   What charge does a proton have?