Electron arrangements

Atoms of different elements have a ?

different number of protons, neutrons and electrons

What does the number shown above each symbol in the periodic table tell us?

The number of protons and electrons in that atom

What are electrons arranged in?

Energy shells

Different chemicals have different?

Atoms

What do atoms of different elements have a different number of?

Protons, Neutrons and electrons

What does the number shown above each symbol in the periodic table tell us?

The number of protons and electrons in that atom

Electron arrangement of an atom

Each shell can only hold a certain number of electrons

Why do elements of the same group have similar chemical properties?

Same number of electrons in their outer shell

Different elements have different number of protons, what is this number called?

The atomic number

What are electrons in an atom arranged in?

Energy levels