CH 4 Physical Science: Atomic Structure

Hydrogen - 1 and Hydrogen - 2 are examples of what?

Atoms are mostly empty space.

Who proposed this model of the atom?

Subatomic particles that have a positive charge.

Most of the mass of an atom is concentrated in the nucleus.

Atoms of carbon always have 6 protons. 

Mass number is defined as the number of ____________ in an atom.

John Dalton thought the atom could not be divided. 

He created the first scientific atomic theory.

How many neutrons are in the following atom? 

The charge of the nucleus of an atom is:

Who proposed that the atom contained a nucleus?

Protons and electrons have the same relative mass.

An atom has 13 protons and 14 neutrons.  How many electrons does it have?

Who discovered the electron?

Who proposed the plum pudding model of the atom?

An atom has an atomic number of 5 and mass number of 11.  How many neutrons does it have?

The gold foil experiment led to the discovery of the:

An atom has 4 protons, 4 electrons, and 5 neutrons.  What is its mass number?

An atom has 10 protons, 10 electrons, and 12 neutrons.  What is its atomic number?

Who proposed this model of the atom?

Subatomics particles that have no charge:

The number of protons in an atom is defined as the:

Subatomic particles that have a negative charge:

Who performed the gold foil experiment?

The Greek philosopher who believed that all matter was composed of tiny particles was:

Atoms that have the same number of protons but different number of neutrons are called:

Atoms of the same element can have different mass numbers.

The model of the atom shown in this picture is called: 

Subatomic particles found in the nucleus of an atom:

In the atom "nitrogen - 15," what does the "15" represent?

How many electrons are in the following atom?