Atoms and the Periodic Table

Front

What is the sum of the protons and neutrons in the nucleus of an atom?

Back

Mass Number (also called Atomic Mass)

Front

What is the atomic number of an element with 24 protons and 24 electrons?

Back

24

Front

What does an atom's group tell us?

Back

Number of valence electrons

Front

The atomic mass of an element is measured in ______.

Back

atomic mass units (amu)

Front

What is a substance that cannot be broken down any further without losing its properties?

Back

Element

Front

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

Back

Atom

Front

What is the term for a substance made of two or more different elements that are chemically bonded?

Back

Compound

Front

What is the term for a mixture where the components are not uniformly distributed?

Back

Heterogeneous mixture

Front

What is the term for the vertical columns in the periodic table?

Back

Groups or Families

Front

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

Back

Periods