1. Have you met atom? – Chapter 11
Atom Ant?

2. Smallest part of an element
Has all the properties of the element
ATOM

3. electron Particle buzzing around the nucleus of an atom
It has a negative charge
electron

4. nucleus The dense part in the middle of an atom
Has protons and neutrons in it
nucleus

5. The area where electrons move
Electron cloud

6. The particles in the nucleus that are positive
proton

7. The unit that describes what the mass of the atom or molecule is.
Can be found on the periodic table
Atomic Mass Unit

8. The particle in the nucleus of an atom that has no charge but has mass
neutron

9. The number of protons in the atom
Atomic Number

10. The same element(atom) that has different amounts of neutrons.
isotope

11. The number of protons and neutrons in an atom added together
Mass Number

12. The mass of an atom expressed in atomic mass units or amu.