Atomic Structure

Question 1

What is an atom made up of ?

Answer 1

At the centre there is a nucleus containing
Protons: mass 1 charge +1
Neutrons: mass 1 charge 0
Around it are electrons arranged in shells
Electron: 1 over 2,000 and negative charge of -1 (very small)

Question 2

How do they connect to the periodic table ?

Answer 2

The atomic number (how many protons) determines what element it is. The period table is in increasing atomic number.

The larger number is mass which is neutrons plus protons.

*proton and electron numbers are the same so if it’s atomic number 3 it also have 3 electrons

Question 3

How would you write electron structures ?

Answer 3

First ring has 2 then each one has. 8

Remember proton and electron number are the same so always look at the atomic number