Atomic Theory and Structure

Front

J.J. Thomson provided evidence that an atom...

Back

contains negatively charged particles

Front

Rutherford discovered the...

Back

nucleus

Front

Isotopes are elements with a different amount of

Back

neutrons

Front

An element will always have the same number of: neutrons, protons, isotopes, atoms

Back

protons

Front

Which particle does not contribute mass to the atom?

Back

Electron

Front

What scientist is best known for his gold foil experiment?

Back

Ernest Rutherford

Front

An atom has 10 protons and a mass of 18. It has __ neutrons.

Back

8

Front

An ______________ is the same element, with the same number of protons, but different numbers of neutrons.

Back

Isotope

Front

The smallest particle into which an element can be divided and still be the same substance

Back

atom

Front

Mass number of an element with 18 protons, 18 electrons, and 19 neutrons.

Back

37