Atoms, Periodic Table, Mixtures And Chemical Reactions Review

Question 1

What is chromatography used to seperate?

Answer 1

Solutions with a number of different solutes in a solvent.

Question 2

What is a solute?

Answer 2

The solid

Question 3

What is the solvent?

Answer 3

The liquid

Question 4

What is the solution?

Answer 4

A liquid mixture in which the minor component (the solute) is uniformly distributed within the major component (the solvent).

Question 5

What is the stationary phase in chromatography?

Answer 5

The solid or viscous liquid

Question 6

What is the mobile phase in chromatography?

Answer 6

When substances are picked up and carried by liquid or gas.

Question 7

What can we say if the Rf values of a reference and a spot match in all solvent?

Answer 7

It’s very likely that the mixture contains the reference compound

Question 8

What is not a reason for repeating the solubility experiment?

Answer 8

To see if you can carry out an experiment in a quicker time.

Question 9

Hydrochloric acid always makes something…

Answer 9

-chloride

Question 10

What is a neutralisation reaction?

Answer 10

When an acid and alkali will neutralise each other and produce a salt and water. This is called a neutralisation reaction.

Question 11

What microscope can see the outline of an atom

Answer 11

Electron microscope

Question 12

Who were atoms discovered by?

Answer 12

John Dalton

Question 13

What is an element?

Answer 13

Something made up of one type of atom.

Question 14

What is a compound?

Answer 14

More than one type of atom chemically bonded together.

Question 15

What is a mixture?

Answer 15

More than one type of atom not chemically bonded together.

Question 16

What can a micture be a mixture of?

Answer 16

Elements and other elements, compounds and other compounds or elements and compounds

Question 17

When are molecules formed?

Answer 17

Molecules are formed when two or more atoms join together chemically.

Question 18

What are covalent bonds?

Answer 18

Bonds between non-metals and non-metals. Covalent bonding is the sharing of electrons in the outer shell of the atom.

Question 19

What are two atoms covalently bonded together called?

Answer 19

Diatomic

Question 20

What do particles do around a fixed position?

Answer 20

Vibrate

Question 21

What do we call the tiny particles found in the universe?

Answer 21

Atoms

Question 22

What state are particles which are not touching and are always moving most likely to be in?

Answer 22

Gas

Question 23

What is the boiling point of water

Answer 23

100*C

Question 24

What is the element at the lowest boiling point?

Answer 24

Helium at -269*C

Question 25

What is the element with the highest boiling point?

Answer 25

Tungsten at 5,555*C

Question 26

What is the element with the lowest melting point?

Answer 26

Helium at -272*C

Question 27

What is the element with the highest melting point?

Answer 27

Carbon at 4500*C

Question 28

What are the physical properties of an element?

Answer 28

Colour, boiling point, melting point and density

Question 29

Who arranged elements into what we now know as the modern periodic table?

Answer 29

Dmitri Mendeleev

Question 30

At the moment how many elements are there in the periodic table?

Answer 30

118

Question 31

How many elements are natural?

Answer 31

90

Question 32

How are elements arranged?

Answer 32

In order of there atomic number.

Question 33

What are the vertical columns on the periodic table called?

Answer 33

Groups

Question 34

What are the horizontal rows of the periodic table called?

Answer 34

Periods

Question 35

What does the size of the atom do as you go left to right along the period?

Answer 35

Decrease

Question 36

What fraction of the elements are metals?

Answer 36

3/4

Question 37

What does the melting and boiling point of alkili metals do as you go down the group

Answer 37

Decrease

Question 38

What will a non-metal do if it reacts with oxygen?

Answer 38

Form a non-metal oxide.

Question 39

What will form when a metal reacts with oxgen

Answer 39

A metal oxide.

Question 40

What can metals be meaning that it makes a ring when hit?

Answer 40

Sonorous

Question 41

Metal is malleable, what does that mean?

Answer 41

It can be bent into shape

Question 42

What is a trend of halogens?

Answer 42

It gets darker and less reactive as you go down the group