Chemistry — periodic table, reactions

What you'll learn

1. 1

   Imagine the periodic table as a giant party where all the elements are guests. Each element has its own name tag with a symbol and number!

2. 2

   What does the atomic number tell you?

3. 3

   Here's a small part of the periodic table. Look at hydrogen (H) with atomic number 1, and helium (He) with atomic number 2.

4. 4

   Let's find out how many protons an element has. Try carbon — atomic number 6.

5. 5

   Now you try! Tap the element with atomic number 8 (oxygen) on the table.

6. 6

   How many protons does oxygen (atomic number 8) have?

7. 7

   When elements react, they swap or share their outer electrons (tiny particles) to become stable. It's like swapping stickers with friends to complete your collection!

8. 8

   Why do elements react with each other?