Atomic Structure

Question 1

What are all subtances made of?

Answer 1

Atoms

Question 2

What is the smallest part of an element?

Answer 2

Atoms

Question 3

What is a compound?

Answer 3

Two or more elements chemically combined

Question 4

How do we seperate compounds?

Answer 4

Chemical reactions

Question 5

What is a mixture?

Answer 5

Two or more elements or compounds not chemically combined

Question 6

How do we seperate mixtures?

Answer 6

Physical seperation techniques (filtration, crystallisation, distillation)

Question 7

What subatomic particle was discovered first?

Answer 7

Electron

Question 8

What was the plum pudding model?

Answer 8

Model of the atom. A ball of positive charge with negative electrons within

Question 9

What disproved the plum pudding model?

Answer 9

Alpha particle scattering experiment

Question 10

What happened in the alpha particle experiment?

Answer 10

Some went through and some were deflected

Question 11

What did the alpha particle experiment discover?

Answer 11

There is a central nucleus with a charge

Question 12

What replaced the plum pudding model?

Answer 12

Nuclear model

Question 13

What did Niels Bohr do?

Answer 13

Suggested electrons orbit the nucleus in shells at specific distances

Question 14

What did James Chadwick discover?

Answer 14

Neutron

Question 15

What is the order of discovery of subatomic particles?

Answer 15

Electron, Proton, Neutron

Question 16

What is the charge of a proton?

Answer 16

+1

Question 17

What is the charge of a neutron?

Answer 17

0

Question 18

What is the charge of an electron?

Answer 18

-1

Question 19

What is the overall charge of an atom?

Answer 19

0

Question 20

In an atom’s nucleus, the number of protons is equal to the number of what?

Answer 20

Electrons

Question 21

An element’s atomic number is the same as the amount of what in its atoms?

Answer 21

Protons

Question 22

What is the relative mass of a proton?

Answer 22

1

Question 23

What is the relative mass of a neutron?

Answer 23

1

Question 24

What is the relative mass of an electron?

Answer 24

Very small

Question 25

Where is most of an atom's mass?

Answer 25

Nucleus

Question 26

What is the radius of an atom?

Answer 26

0.1 nm

Question 27

The sum of the protons and neutrons in an atom is its what?

Answer 27

Mass number

Question 28

Is the mass number on top or bottom?

Answer 28

Top

Question 29

Is the atomic number on top or bottom?

Answer 29

Bottom

Question 30

What is an isotope of an element?

Answer 30

Atoms of the same element with different numbers of neutrons

Question 31

What is an element's relative atomic mass?

Answer 31

Average value that takes into account the abundance of the element's isotopes