U1L3 Molecules and Extended Structures

Properties of a material depends on the _____ that make it up and how the ______ of those ________ are bonded to each other.

elements, atoms, elements

Know how to interpret the ratio of atoms when written in a chemical formula:

Ex. H20 = 2 hydrogen : 1 oxygen

Lines or sticks in a molecular model represent…

chemical bonds

Chemical bonds are NOT physical connections. They are ____ that hold _____ together in a _______.

forces, atoms, bond

A ________ is _____ or more different _______ bonded together.

compound, two, elements

A _____ is created when ____ or more ______ react and form chemical bonds.

compound, two, elements

The reason ______ in the same group of the periodic table have similar properties is because they have the _____ number of _____ _____ or _____ ______.

elements, same, valance electrons, outer electrons

_______ join together in specific ratios to form _______.

Elements, compounds

When ____ gain or lose _______ they become _____.

atoms, electrons, ions

Ionic bonding:

1 non-metal and 1 metal

Covalent bonding:

2 non-metals