Chemistry Review 2nd Trimester

Atoms that carry a positive or negative net charge because they have gained or lost electrons

• Ions

• Cations

• Anions

• Isotopes

An ion that has lost one or several electrons and that has therefore a positive net charge.

• Ions

• Cations

• Anions

• Isotopes

An ion that has gained one or several electrons and that has therefore a negative net charge.

• Ions

• Cations

• Anions

• Isotopes

Atoms of a single element that have a different number of neutrons.

• Ions

• Cations

• Anions

• Isotopes

Whic of the following are are characteristics of ISOTOPES?

• The mass remains the same, even with the addition or sustrction of neutrons

• The same number of protons or the same atomic numbers

• Different net charge

• Different numbers of neutrons and, therefore a different mass number

How do you calculate the mass number of an element?

• Neutrons + Protons

• Total of Protons

• Protons - Electrons

How do you calculate the atomic number of an element?

• Neutrons + Protons

• Total of Protons

• Protons - Electrons

How do you calculate the net charge of an element?

• Neutrons + Protons

• Total of Protons

• Protons - Electrons

A representation of how the valence electrons are distributed around teh atoms in a molecule, shaerd pair of electrons are drawn as lines between atoms while lone pairs are drawn as dots next to atoms.

Explain what is the Octet Rule: