C1.1 Flashcards
1
Q
What is the atomic number?
A
Number of protons and electrons
2
Q
What is the mass number?
A
Number of particles in the nucleus (protons and neutrons)
Neutrons= mass number- protons
3
Q
When different elements combine, what do they form?
A
Compounds
4
Q
What is an element made up of?
A
One type of atom