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

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.

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.

An atom is: An element is: An molecule is

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

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

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.

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.

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.

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.

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.

Proton

Proton Neutron

Proton Neutron Electron

Proton Nucleus Neutron Electron

Proton Nucleus Neutron Electron Valence electron Proton Nucleus Neutron Electron

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

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

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