C1 Atomic Structure

Question 1

What are all substances made up of

Answer 1

Atoms

Question 2

How many types of atoms do elements contain

Answer 2

One

Question 3

How many types of atoms do compounds contain

Answer 3

More than 1

Question 4

Structure of an atom

Answer 4

Has a tiny nucleus at its centre, surrounded by electrons

Question 5

What information can be deduced from the chemical formula CO2

Answer 5

There is one carbon atom which is chemically bonded with two oxygen atoms

Question 6

What did john dalton think atoms were

Answer 6

Solid spheres.

Question 7

What did jj thomson think atoms were

Answer 7

Plum pudding model- the atom is a ball of charge with electrons scattered.

Question 8

What did ernest rutherford’s alpha scattering experiment show

Answer 8

the atom is mostly empty space with a tiny, dense, positively-charged nucleus

Question 9

What did niels bohr discover

Answer 9

Electrons are in shells orbiting the nucleus

Question 10

What did james chadwick discover

Answer 10

There were neutrons in the nucleus.

Question 11

What does the atomic mass equal

Answer 11

Number of protons + number of neutrons

Question 12

What does the atomic number show

Answer 12

Number of protons and electrons

Question 13

What does negligible mean

Answer 13

Mass of an electron (1/2000)

Question 14

How do you find the amount of neutrons

Answer 14

Mass number-atomic number

Question 15

How are electrons arranged

Answer 15

In shells

Question 16

How many electrons can the first shell hold

Answer 16

2

Question 17

How many electrons can the second and higher shells hold

Answer 17

8 electrons

Question 18

What does the number of electrons in the outermost shell of an element’s atoms determine

Answer 18

The way in which that element reacts.

Question 19

Why do group ones lose an electron

Answer 19

To become a noble gas to become stable.

Question 20

How does sodium chloride make an ion formation

Answer 20

Sodium wants to get rid of the electron in the outer shell to become more stable and chlorine wants to gain an electron to make a full shell so the sodium electron goes to chlorine