Material World N4

Question 1

What is an atom?

Answer 1

Basic unit of matter

Question 2

What charge does a proton have?

Answer 2

+1

Question 3

What charge does an electron have?

Answer 3

-1

Question 4

What charge does a neutron have?

Answer 4

0

Question 5

What mass (a.m.u) does a proton have?

Answer 5

1

Question 6

What mass (a.m.u) does an electron have?

Answer 6

0

Question 7

What mass (a.m.u) does a neutron have?

Answer 7

1

Question 8

What is an atomic number?

Answer 8

The number of protons in an atom

Question 9

What is a mass number?

Answer 9

number of protons + number of neutrons

Question 10

What is nuclide notation?

Answer 10

Shows an element symbol, atomic no. and mass no.

Question 11

What is an isotope?

Answer 11

Same atomic number, different mass number due to a different number of neutrons

Question 12

Can isotopes be stable and unstable?

Answer 12

Yes

Question 13

Unstable isotopes are called…?

Answer 13

Radioisotopes

Question 14

What is relative atomic mass?

Answer 14

The mass of an atom

Question 15

What does an electron arrangement show?

Answer 15

The position of electrons around the nucleus

Question 16

What are 2 patterns in electron arrangements?

Answer 16

The total = the atomic number, ever element in a group ends in the same number

Question 17

What is chemical formula?

Answer 17

Tells you about the atoms present

Question 18

State all of the diatomic elements

Answer 18

Hydrogen, Iodine, Nitrogen, Chlorine, Bromine, Oxygen, Fluorine

Question 19

State all of the prefixes up to 6

Answer 19

Mono, Di, Tri, Tetra, Penta, Hexa

Question 20

What is valency?

Answer 20

Number of bonds an atom can make, linking to the number of unpaired electrons in the outermost

Question 21

State the valency for each group up to 8/0

Answer 21

1, 2, 3, 4, 3, 2, 1, 0

Question 22

Where on the periodic table can valency change?

Answer 22

Transition metals

Question 23

If the valency is not stated for a transition metal what should you assume it is?

Answer 23

2, except silver which should be assumed as 1

Question 24

Why do atoms form bonds?

Answer 24

To become stable

Question 25

When do atoms become stable?

Answer 25

When they have a full outer shell

Question 26

What is covalent bonding?

Answer 26

Electrostatic attraction between positive nuclei and a shared pair of electrons

Question 27

Where does covalent bonding normally happen?

Answer 27

In non metals

Question 28

How is covalent bonding represented?

Answer 28

A lewis dot-cross diagram

Question 29

What happens when chemicals react?

Answer 29

Mass is conserved

Question 30

What does GFM mean?

Answer 30

gram formula mass

Question 31

When calculating GFM what does n and m stand for?

Answer 31

Number of moles, mass (g)

Question 32

What is the definition of compound?

Answer 32

More than one type of atom

Question 33

In ionic bonding what happens to electrons?

Answer 33

Electrons are transferred, one atom with lose electron/s the other will gain

Question 34

What happens when an element gains/loses electrons?

Answer 34

It forms charged particles called ions

Question 35

Why does group 4 not tend to form ions?

Answer 35

The metals in the group form the ion based on the valence

Question 36

What are the large structures that ionic compounds form called?

Answer 36

Crystal lattices