Chapter 1 Module 1 Atoms, ions, molecules, isotopes

Atom is the _______________ of matter that retains all of the _______________ of an element

Smallest unit; chemical properties

Atoms are made up of subatomic particles called ________________________, which are responsible for the ___________ and _______________

Protons, neutrons, and electrons; mass; charge of atoms

Protons are the ________________, are ____________ charged

Atomic number of element; positively

Neutrons are _________

Neutral have no charge

Electrons are __________ charged

Negatively

Both protons and neutrons add to the ________________

Mass of the atom

The number of protons is ________ the number of electrons in _____________

Equal to; neutral atoms

Molecules are made of _______________ that are held together by _______________

Two or more atoms; chemical bonds

Ions are atoms that have ____________________, resulting in a net charge

Gained or lost electrons

A neutral atom is going to have __________ of positively charged protons and negatively charged electrons

Equal amounts

An ion is going to either have a _____________ when it loses electrons or a _______________ when it gains electrons

Positive charge; negative charge

Atomic number is the number equal to the number of _________ in an atom’s nucleus

Protons

Atomic mass is the sum of the ___________ and ___________

Mass of protons; neutrons

To find protons,

Look in the periodic table for the atomic number

To find neutrons,

Subtract the mass of the element minus the number of protons

To find electrons, we know protons and electrons have the _______________________

Same number unless is not neutral

Isotopes are atoms of the same element that have _______________________

Different number of neutrons

Isotopes of the same element generally have similar _____________________

Physical and chemical properties

Cation is an atom that has ___________________ and is ______________. The name of the cation is the ________ as the name of the atom

Lost one or more electrons; positively charged; same

Cations have more ______ than ________

Protons; electrons

Anion is an atom that has __________________ and is therefore _________________. The name of the anion is the same as the name of the atom with the suffix _______

Gained one or more electrons; negatively charged; -ide

Anion have more _______ than ______

Electrons; protons

Example of naming anion: chlorine is a non metal, and its anion is a ___________

Chloride ion

Identify each of the following as either element, ions, or molecules:

CH4

H+

H2O

H2

1. Molecule

2. Ion

3. Molecule

4. Element

Which of the following would produce an anion?

Ca

Mg

Be

F

F