- Created by: Firdaws123
- Created on: 27-11-17 15:41
24– Mass number (Protons + Neutrons)
12– Atomic number (Protons + Electrons)
Relative mass Charge
Proton 1 +1
Neutron 1 0
Electron Very small -1
Atoms are neutral because they have equal number of Protons and electrons so cancel each ther out.
It is an copy of an atom,same number of Protons/electrons but not neutrons.
C C Reaction same because same number of electrons. Carbon 13
6 6 Will be heavier because it has more neutrons which control mass.
Group 1- Alkali metals
➖1 electron in outer shell
➖Called alkali metals because very reactive
➖React rapidly with oxygen, chlorine and water
As you go down it gets more reactive because......
➖ Outer electron is further from nucleus so less attraction and easier to lose.