Atoms, Elements, Periodic table & Electron shells Flashcards
What do atoms have?
A small nucleus surrounded by electrons
What are the 2 sub-atomic particles in the nucleus of an atom?
Protons and electrons
Why are some atoms unreactive from looking at them?
As their shells are full up
Why is there no overall electrical charge on each atom?
The number of protons is equal to the amount of electrons.
What is a protons and neutrons charge?
Proton - postitive charge
Neutron - no charge
What charge do electrons have?
Electrons - negative charge
What happens if some electrons are removed or added to an atom?
The atom becomes charged and changes to an ion.
What is an element?
A substance with only 1 type of atom.
How many electrons go on each shell of an atom?
1st shell - 2
2nd shell - 8
3rd shell - 8
On the p table, where do you find the amount of protons and electrons of an atom?
The bottom left corner of each square.
