Periodic Table

Front

What is the unique number for each element that equals the number of protons in an atom of that element?

Back

Atomic number

Front

What is the basic structural unit of matter?

Back

Atom

Front

What is the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom?

Back

Atomic mass

Front

What is a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means?

Back

Element

Front

What is a grouping of elements based on similar properties, arranged by columns in the periodic table?

Back

Family

Front

What is the smallest particle of an element that retains the properties of that element?

Back

Atom

Front

What is the term for the horizontal rows in the periodic table?

Back

Period

Front

What are the negatively charged particles that orbit the nucleus of an atom?

Back

Electrons

Front

What is the center of an atom called, containing protons and neutrons?

Back

Nucleus

Front

What is the term for atoms of the same element that have different numbers of neutrons?

Back

Isotopes