Chemistry- atoms (year 9)

Question 1

What do atoms contain?

Answer 1

Protons, Neutrons and Electrons

Question 2

protons have a charge of…

Answer 2

+1

Question 3

Neutrons have a charge of…

Answer 3

0

Question 4

Electrons have a charge of…

Answer 4

-1

Question 5

protons and neutrons have a relative mass of…

Answer 5

1

Question 6

electrons have a relative mass of…

Answer 6

0

Question 7

Where is the nucleus located?

Answer 7

In the middle of the atom

Question 8

What does the nucleus contain?

Answer 8

Protons and neutrons with a positive charge

Question 9

Where does the electrons go?

Answer 9

They move around the nucleus in electron shells

Question 10

Are atoms neutral?

Answer 10

yes

Question 11

What does all atoms have?

Answer 11

The same number of protons and electrons

Question 12

What does an ion with a 2- charge have?

Answer 12

2 more electrons than protons

Question 13

What does the nuclear symbol of an atom tell you?

Answer 13

its atomic number and mass number

Question 14

What does the atomic number tell you?

Answer 14

How many protons there are

Question 15

What does the mass number tell you?

Answer 15

The total number of protons and neutrons in the atom

Question 16

How do you get the number of neutrons?

Answer 16

Subtract the atomic number from the mass number