Chemistry Mid Term

Front

What is the name of the element with the symbol 'O'?

Back

Oxygen

Front

How many neutrons are in an atom of silicon (Si)?

Back

14

Front

What can be concluded if three samples of hydrogen are isotopes of the same element?

Back

Each sample has the same number of protons but different numbers of neutrons.

Front

Isotopes of the same element must have different numbers of what?

Back

Neutrons

Front

What is the identity of an isotope with 15 protons, 15 electrons, and 17 neutrons?

Back

P-32

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What are isotopes?

Back

Atoms of the same element that have different numbers of neutrons.

Front

What is the charge of a neutron?

Back

Neutrons have no charge (neutral).

Front

What is the charge of a proton?

Back

Protons have a positive charge.