1. Follow along and fill in the missing information on your sheet.
Atoms
Follow along and fill in the missing information on your sheet.

2. Particle Model
To help us understand atoms, we need to think about the particle model. In the following table, draw what solids, liquids, and gases look like according to the particle model.

3. Particle Model
To help us understand atoms, we need to think about the particle model. In the following table, draw what solids, liquids, and gases look like according to the particle model.

4. An atom is:
An element is:
An molecule is

5. An atom is: the smallest unit of matter
An atom is: the smallest unit of matter. It is the “building block of matter”
An element is:
An molecule is

6. An atom is: the smallest unit of matter
An atom is: the smallest unit of matter. It is the “building block of matter”
An element is: a substance made up of only one type of atom.
An molecule is

7. An atom is: the smallest unit of matter
An atom is: the smallest unit of matter. It is the “building block of matter”
An element is: a substance made up of only one type of atom.
An molecule is: two or more atoms joined together.

8. Most atoms look something like this
Most atoms look something like this. The middle of the atom is made up of tiny particles called _____________ and _____________. Together, they form the “core” of the atom, which is called the _____________.
Several other tiny particles called _____________ orbit around the nucleus.

9. Most atoms look something like this
Most atoms look something like this. The middle of the atom is made up of tiny particles called protons and neutrons. Together, they form the “core” of the atom, which is called the _____________.
Several other tiny particles called _____________ orbit around the nucleus.

10. Most atoms look something like this
Most atoms look something like this. The middle of the atom is made up of tiny particles called protons and neutrons. Together, they form the “core” of the atom, which is called the nucleus.
Several other tiny particles called _____________ orbit around the nucleus.

11. Most atoms look something like this
Most atoms look something like this. The middle of the atom is made up of tiny particles called protons and neutrons. Together, they form the “core” of the atom, which is called the nucleus.
Several other tiny particles called electrons orbit around the nucleus.

13. Proton

14. Proton Neutron

15. Proton Neutron Electron

16. Proton Nucleus Neutron Electron

17. Proton Nucleus Neutron Electron
Valence electron
Proton Nucleus Neutron Electron

18. Proton Nucleus Neutron Electron
Valence electron Energy shell
Proton Nucleus Neutron Electron

19. Proton Nucleus Neutron Electron
Valence electron Energy shell
Valence shell
Proton Nucleus Neutron Electron

20. A valence electron is an electron that is in the outermost energy shell.