Term 1

The Periodic Table

In this term, we were introduced to the periodic table, which groups elements based on their properties.

We were taught how to derive the number of protons, electrons and neutrons by referring to the periodic table. We also learnt about ions and compounds.

Ionic Bond: result the transfer of electrons from metal atoms to non-metal atoms forming positive and negative ions. The electrical forces between these oppositely charged ions  produce strong ionic bonds.

Covalent Bond: formed by the sharing electrons between two atoms. Each atom contributes 1 electron to the bond.

Figure 1

Atomic Number = No of Protons = No. of electrons

Nucleon/Mass Number = No of protons + No of neutrons

Carbon: 

Atomic Number 6 = No. of protons and electrons

Mass Number 12 = No. of protons + neutrons

Neutrons = 6

Protons = 6

Electrons = 6

Figure 2

Figure 2 (Above) shows the structure of an atom, consisting of the proton, neutron and electron.