Atoms and Elements Flashcards
What do atoms have?
Small nucleus surrounded by electrons.
What does the nucleus contain?
Protons and neutrons.
What charge do protons have?
Positive charge.
What charge do neutrons have?
No charge.
They’re neutral.
What charge does the nucleus?
Positive charge, because of the protons.
The size of the nucleus?
It is tiny compared to everything else in the atom.
What charge do electrons have?
Negative charge.
The size of the electrons?
They are tiny but cover a lot of space.
What do the electrons occupy?
Shells around the nucleus.
The shells explain what?
The whole of Chemistry.
Number of protons =
Number of electrons.
What charge do atoms have?
No charge overall.
Neutral.
The charge on the electrons is what?
The same size as the charge on the protons - but opposite.
What happens if some electrons are added or removed?
The atom becomes charged and is now an ion.
Elements only consist of what?
One type of atom only.
