Atoms and Elements

Nucleus

Center of an atom, made up of protons and neutrons

Metals

Conduct electricity, ductile, luster, malleability, and conduct heat.

Element

Substance made up of only one kind of atom

H2CO3

The formula for a molecule that has1 carbon atom, 2 hydrogen atoms, and 3 oxygen atoms.

Atomic number of an element

The number or protons

Insulators

an element that binds tightly to their atoms and conducts hardly any electricity.

Periodic Table

arrangement of elements by similar properties. *Note: Students will need to know how to use a Periodic Table to identify an element's atomic number, physical states, symbols, and similar properties. Additionally, given melting points for certain elements, students will need to be able to infer which elements are liquids, solids or gases.

Periodic Table arrangement

by atomic number and similar properties.

Atom's Element

determined by the number of protons.

The attraction between electrons and protons

hold together atoms.

Atom

smallest unit of an element with all the properties of that element

Electron:

subatomic particle with a negative charge

Proton

subatomic particle with a positive charge

Neutron

subatomic particle with no charge

Compound

substance made up of the atoms of two or more elements

Molecule

two or more atoms joined together