Atomic Structure & History Test

Front

How many neutrons does a sodium atom have?

Back

12

Front

How many protons does an aluminium atom have?

Back

13

Front

Who discovered the nucleus of the atom through the Gold Foil Experiment?

Back

Rutherford

Front

What is the atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons?

Back

9

Front

Who believed that atoms of the same element are identical to each other?

Back

Dalton

Front

What is the definition of an atom?

Back

The smallest unit of matter that retains the properties of an element.

Front

What is the charge of a proton?

Back

Positive (+1)

Front

What is the charge of a neutron?

Back

Neutral (0)

Front

What is the charge of an electron?

Back

Negative (-1)

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.