1.03 Atomic Theory & Mass Review

Front

Atoms are the building blocks of matter.

Back

True

Front

Which scientist's atomic model is similar to a chocolate chip cookie?

Back

Thomson

Front

Thomson discovered negatively charged particles called

Back

electrons

Front

According to Rutherford, what are the characteristics of an atom?

Back

The atom's positive charge is at its center, most of the mass of an atom is concentrated at its center, and electrons move around the center of an atom.

Front

Each element has a unique number of

Back

protons

Front

Protons and electrons are almost identical in size and mass.

Back

False

Front

An element’s atomic number is equal to its number of: protons, electrons, neutrons, valence electrons

Back

protons

Front

According to the modern atomic theory, where are electrons located?

Back

electrons are located on electron clouds

Front

The ______ has the least mass of all the subatomic particles. It contributes very little to the overall atomic mass.

Back

Electron