1.1 - Atoms

Question 1

What is the charge on a proton?

Answer 1

Positive charge

Protons are fundamental particles found in the nucleus of an atom.

Question 2

What makes up the nucleus of an atom?

Answer 2

Protons and neutrons

The nucleus is the central part of an atom where most of its mass is concentrated.

Question 3

Which particle determines what element an atom is?

Answer 3

Proton

The number of protons in the nucleus defines the atomic number and thus the element.

Question 4

Which particles within an atom have a relative mass of 1?

Answer 4

Protons and neutrons

Electrons have a much smaller mass compared to protons and neutrons.

Question 5

Which sub-atomic particle does NOT have a charge?

Answer 5

Neutron

Neutrons are neutral particles found in the nucleus of an atom.

Question 6

What do we call an atom that has a positive or negative charge?

Answer 6

Ion

Ions are formed when atoms gain or lose electrons.

Question 7

What is the charge on an electron?

Answer 7

Negative charge

Electrons carry a negative charge and are found in energy shells around the nucleus.

Question 8

Electrons orbit the nucleus in _______.

Answer 8

energy shells

Energy shells are regions around the nucleus where electrons are likely to be found.

Question 9

If an atom has 6 protons and 5 electrons, what charge will it have overall?

Answer 9

Positive charge

The overall charge is determined by the difference between the number of protons and electrons.