Atoms test

What is the atomic mass?

• the number of neutrons and electrons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of protons in the nucleus

• the number of protons and electrons in the nucleus

Who discovered the electron with the cathode ray tube experiment?

• Dalton

• Thomson

• Rutherford

• Bohr

Most of the mass of an atom is contained in the ____?

• nucleus
• electron cloud

The smallest particle of any particular type of matter is known by which of the following terms?

• Compound

• Atom

• Molecule

• Element

According to the periodic table, if an atom has 3 electrons, how many protons will it have?

• 1

• 2

• 4

• 3

What is the number of protons that the element in this image contain?

• 14

• 7

• 15

• 18

How many neutrons are in the element Mg?

• 24

• 12

• 36

• 25

True or False: An atom that has 12 protons, 13 neutrons, and 13 electrons has a neutral charge.

• false

• true

As seen on the periodic table, we observe an atom that has 13 protons and 14 neutrons. How many electrons are found in the atom?

• 13

• 15

• 27

• 14

What is the overall charge of the nucleus?

• Positive

• Negative

• Neutral