Science Chapter 5 - Atoms and bonding

An atom is less likely to react if it has 8 valence electrons, but if it has less than 8, it will try to react with another atom so that it can have 8.

it gives you information about the arrangement of electrons in atoms.

• 1:1
• 2:2
• 13:3
• 14:4
• 15:5
• 16:6
• 17:7
• 18:8

an electron with the highest energy level that is held most loosely.

A chemical bond is the force of attraction that holds two atoms together as a result of the rearrangement of the electrons between them.

an atom or group of atoms that has an electric charge.

As a result of the attraction between positive and negative ions.

With the two chemical symbols of the elements written next to each other.

The name of the postitive ion followed by the name of the negative ion.

Hard brittle crystals with high melting points. they conduct electricity when dissolved in water.

A polyatomic ion is an ion made of more than one atom.

The attraction of each atoms nucleus to the shared pair of electrons.

lower melting and boiling points, do not conduct electricity.

Atoms of some elements pull more strongly on shared electrons.

a covalent bond where electrons are shared unequally.

A covalent bond where electrons are shared equally.

Alloys are generally stronger and less likely to react with air or water.