SCIENCE 9 NAME: MS. L BLOCK: DATE: Introduction to Compounds (Ch.8)

Recall:

Elements:

COMPOUNDS

- A compound is a made of two or more that

are

e.x. Water (H2O)

- elements combine to form compounds because they are trying to become more

- The most stable elements have a

e.x.

So, to be stable, most elements are trying to become like their nearest

octet rule: Elements bond with other elements to allow both to have

e.x: Sodium e.x. Fluorine

MATTER

Use your handout [3.1 - Compounds] to fill in the blanks below

Compounds form through

Chemical bonds:

We know that most compounds are one of two types: or

COVALENT COMPOUNDS - the sharing of electrons between two non-metals

In covalent compounds, atoms combine by electrons to form

Molecule:

Give two examples of covalent compounds:

In covalent compounds, the smallest particles are single .

In water, the covalent bonds that hold the molecule together are formed by the atoms of

and sharing pairs of .

Draw three representations of a water molecule in the boxes below. Label the H and O atoms in each.

IONIC COMPOUNDS – the transfer of electrons between metals & non-metals

In ionic compounds, atoms or electrons to form . This

transfer happens so that each element can have a full outer shell. (see diagram below)

When ionic compounds form, the atoms are not actually connected to each other. They are instead attracted

to each other because the ions in the compound have charges.

Ionic compounds exist as a in the form of an

Ionic lattice: