Atomic Structure

Question 1

Nucleus

Answer 1

A nucleus is the positively charged center of and atom consisting of protons and neutrons.

Question 2

Properties of protons

Answer 2

Protons are a type of subatomic particle with a postive charge

Question 3

Properties of neutrons

Answer 3

Neutrons have no electric charge

2000 times the mass of an electron

Question 4

Properties of electrons

Answer 4

Involved in chemical reactions with other atoms

Question 5

Atomic number

Answer 5

The number of protons in the nucleus of an atom

Question 6

Mass number

Answer 6

The total number of protons and neutrons in a nucleus

Question 7

Isotopes

Answer 7

Each of two more forms of the same element that contains equal numbers of protons but different numbers of neutrons in their nuclei

Question 8

Group number

Answer 8

The number above each element to show the groups that the elements are in

Question 9

Period number

Answer 9

The number that is given to a group of elements across the periodic table that have made a round from completing its outer electron shell

Question 10

Electron arrangement

Answer 10

Electrons are arranged in shells around an atom’s nucleus. Electrons closest to the nucleus will have the lowest energy