Structure of an atom - Intro to Back to Basics (1.1)

Question 1

Define matter

Answer 1

Matter is a physical substance which occupies space and has mass

Question 2

Define atom

Answer 2

The smallest particle, made up of protons, neutrons & electrons

Question 3

Define molecule

Answer 3

Any two or more atoms joined together by any type of chemical bond

Question 4

Define element

Answer 4

Substance made up of only one type of atom

normally exist as atoms or molecules

Question 5

Define compound

Answer 5

Molecules that contain two or more different types of atoms chemically bonded together

Question 6

Define mixture

Answer 6

Two or more atoms, ions, molecules or compounds that are mixed together but not chemically bonded

Question 7

What is the relative charge of each of the sub-atomic particles of an atom?

Answer 7

Proton +1
Neutron 0
Electron -1

Question 8

What is the relative mass of each of the sub-atomic particles of an atom?

Answer 8

Proton 1
Neutron 1
Electron very small

Question 9

What is different about each element?

Answer 9

The number of protons in their nucleus

Question 10

Define isotope

Answer 10

Atoms with the same number of protons, but a different number of neutrons

Question 11

Atoms have the same number of protons and electrons. True or false?

Answer 11

True

Question 12

How do you work out the number of neutrons in an atom/isotope?

Answer 12

Mass number - atomic number

Question 13

What is the difference between relative atomic and molecular mass?

Answer 13

RAM - only one atom

Mr - calculated by adding together all of the atomic masses in the molecule