Atomic Structure

Question 1

Atom

Answer 1

The smallest piece of an element that can still be recognised as that element

Question 2

Molecule

Answer 2

Two or more atoms covalently bonded together. Contains a certain fixed number of atoms

Question 3

Neutron

Answer 3

Found in the nucleus, 1 mass, no charge

Question 4

Proton

Answer 4

Found in the nucleus, 1 mass, positive charge

Question 5

Electron

Answer 5

Found in the shell, negligible mass, negative charge

Question 6

Atomic number

Answer 6

The number of protons in an atom

Question 7

Mass number

Answer 7

The total number of protons and neutrons in the nucleus of an atom

Question 8

Relative atomic mass

Answer 8

The weighted average mass of the isotopes of an element relative to the mass of 1/12 of a carbon-12 atom

Question 9

Isotope

Answer 9

Different atoms of the same element, with the same number of protons but a different number of neutrons. Also have the same chemical properties

Question 10

Ar

Answer 10

Mass of isotopes*percentage abundance over 100