Bonding and atomic structure

The sharing of a pair of electrons between 2 atoms (only with non-metals)

The electrostatic attraction between oppositely charged ions (Only with one metal and one non-metals)

The atom that gains the electrons becomes a negatively charged anion, the atom that loses the electrons becomes a positively charged cation

However many electrons are needed for a full outer shell, that’s how many it will share

Shell, nucleus, protons, netrouns, electrons

Atomic mass - The average mass of one atom of an element relative to the mass of 1/12th of carbon-12 atom, it is the number of protons and neutrons, this does not have to be unique Atomic number - The number protons in an element, unique to every element. If this changes, the element changes, same as number of electrons (If not charges)

Mass = 1 amu Charge = Neutral (0) Where it is = Nucleus

Mass = 1 amu Charge = Positive (+1) Where it is = Nucleus

Mass = 1 —— 1840 Charge = Negative (-1) Where it is = Shell

Two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons

1st shell = 2 2nd shell = 8 3rd shell = 8 4th shell = 18

100

The smallest particle that can exist

A substance that contains 2 or more atoms that have been chemically bonded together