1st Asses

Question 1

What is an ion

Answer 1

A charged atom

Question 2

What is an element

Answer 2

A substance made of only one type of atom.
Cannot be broken down chemically into any simpler substance.
Organised increasing atomic number in periodic table.

Question 3

Atom

Answer 3

An atom is the smallest part of an element that can exist. Radius of atom 0.1nm(1*10^-10m)

Question 4

Compound

Answer 4

is a substance formed when two or more chemical elements are chemically bonded together.

Question 5

Mixture

Answer 5

contains two or more substances that are not chemically combined.

Question 6

Proton relative charge and mass

Answer 6

+

1

Question 7

Electron relative charge and mass

Answer 7

-

1/2000

Question 8

Neutron relative charge and mass

Answer 8

0

1

Question 9

Structure periodic elements

Answer 9

Relative atomic mass
Atomic symbol
Name
Atomic(proton) number

Question 10

What charge do atoms have

Answer 10

0 (no charge)

Question 11

Isotopes

Answer 11

Are atoms of the same elements with different number neutrons and atomic mass

Question 12

Radius of atom

Answer 12

0.1nm(1*10^-10)

Question 13

Radius of nucleus

Answer 13

1/10,000 that of the atom

Question 14

Where are electrons found

Answer 14

Energy levels of an atom

Question 15

Monoatomic elements

Answer 15

Noble gases (single atoms)

Question 16

What is a group

Answer 16

A vertical column in the periodic table; also called a family.

Question 17

Period

Answer 17

is the name given to a horizontal row of the periodic table.

Question 18

How reactive are noble gases

Answer 18

Unreactive

Question 19

Polyatomic elements

Answer 19

Consisting multiple atoms chemically bonded S8, P4 sulphur, phosphoros

Question 20

Molecules

Answer 20

Small groups of atoms that are covalently bonded

Question 21

Mass number=

Answer 21

Number protons+ neutrons an element contains in its nucleus

Question 22

Ions formed from metals

Answer 22

Cations (+)

Question 23

Ions formed from non-metals

Answer 23

Anions(-)

Question 24

More reactive metal=

Answer 24

Lose electrons easier

Question 25

Diatomic go in

Answer 25

2’s

Question 26

Ionic bonding=

Answer 26

Electrostatic attraction between oppositely charged ions

Question 27

Why does reactivity increase down group 1

Answer 27

The ability to lose electrons increases because atomic radii increases and more energy levels=greater shell shielding and effective nuclear charge decreases

Question 28

Group 7 further down=

Answer 28

Less reactive because the atoms become larger down the group the intermolecular forces become stronger and more energy is needed to overcome these forces so it is harder to gain electrons with a weaker attraction between the nucleus and the electron gained

Question 29

Describe and explain the chemical reactivity for group 0 or noble gases

Answer 29

They have a low reactivity as they do not need to share electrons with any other substances to get a full valence shell but still react. The reactivity decreases as you go down the group as the density increases and the forces of attraction between the electrons decreases as there is more shells shielding.

Question 30

Properties of group 7 elements

Answer 30

Non metals, brittle as solids, dull, thermal and electrical insulators, low density

Question 31

Each group in the periodic table contains elements with

Answer 31

Similar chemical properties

Question 32

Mixtures can be separated

Answer 32

Only by physical means such as filtration, simple distillation and crystallisation

Question 33

Fractional distillation

Answer 33

Effective way of separating miscible liquids using a fractionating column ,the separation is possible because of the different boiling points of the liquids in the mixture

Question 34

Paper chromatography

Answer 34

Separates mixtures of substances dissolved in a solvent as they move up a piece of chromatography paper. The different substances are separated because of their different solubilities in the solvent used