PS Chapter 9 Test Review

Front

Isotopes are atoms that have different __________________.

Back

mass numbers

Front

Two atoms that have different numbers of protons are _____________.

Back

different elements

Front

Based on his research of the atom, James Chadwick concluded that _______________.

Back

The nucleus contains neutrons as well as protons

Front

An ion forms when an atom gains or loses ______________________.

Back

electrons

Front

A positively charged ion is formed when _______________.

Back

an electron is lost

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons and different mass numbers.

Front

What defines an element?

Back

A substance that cannot be broken down into simpler substances and is defined by its number of protons.

Front

What is the charge of a neutron?

Back

Neutrons have no charge (neutral).

Front

What happens to an atom when it loses an electron?

Back

It becomes a positively charged ion.

Front

What is the role of electrons in chemical bonding?

Back

Electrons in the outer shell (valence electrons) are involved in forming bonds between atoms.