Chemistry test 1

Question 1

What is hydrogen at room temperature?

Answer 1

Gas

Question 2

Is chemical or physical bonding stronger?

Answer 2

Chemical

Question 3

All … are made up of atoms

Answer 3

Substances

Question 4

How many groups are there in the periodic table?

Answer 4

8

Question 5

Elements contain only … type of atom

Answer 5

one

Question 6

Compounds contain more than one type of …

Answer 6

atom

Question 7

An atom has a … at its centre, surrounded by electrons (in the shells)

Answer 7

Nucleus

Question 8

An atom has a nucleus containing …

Answer 8

Protons and Neutrons

Question 9

Protons have a … charge

Answer 9

Positive

Question 10

Neutrons have a … charge

Answer 10

Neutral

Question 11

Electrons have a … charge

Answer 11

Negative

Question 12

What is an isotope?

Answer 12

Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons.

Question 13

… are atoms of the same element with the same number of protons but different numbers of neutrons.

Answer 13

Isotopes

Question 14

What is the relative atomic mass of an element?

Answer 14

The average mass of the atoms of an element taking into account all of the isotopes of that element

Question 15

What is the relative atomic mass of Bromine?

Answer 15

80

Question 16

What is the relative atomic mass of Neon?

Answer 16

20

Question 17

What is the relative atomic mass of Aluminium?

Answer 17

27

Question 18

Where are transition metals positioned on the periodic table

Answer 18

Between groups 2 & 3

Question 19

True or False: Transition metals are highly reactive

Answer 19

False

Question 20

True or false: Transition metals can form positive ions with different charges

Answer 20

True

Question 21

True or False: Transition metals form coloured compounds and are useful as catalysts

Answer 21

True

Question 22

True or False: Transition metals have similar properties to alkali metals

Answer 22

True

Question 23

Y/N: Are the transition metals harder and stronger than the alkali metals?

Answer 23

Yes

Question 24

Y/N: Is aluminum a transition metal?

Answer 24

No

Question 25

Noble gases are very u.........

Answer 25

Unreactive

Question 26

Does the boiling point of Noble Gases (increase / decrease / stay the same) as you go down the periods in the periodic table?

Answer 26

Increase

Question 27

Why are the Noble Gases highly unreactive & why do they form molecules?

Answer 27

Their atoms have a full outer shell of electrons

Question 28

what are the physical properties of transition metals?

Answer 28

-Shiny -Conduct heat & electricity -Strong & hard -Higher density than group 1 -Higher melting point than group 1 (except Hg (Mercury))

Question 29

what are the physical properties of alkali metals?

Answer 29

-Shiny when freshly cut -Very soft -Good thermal and electrical conductors -Relatively low density -Relatively low melting point

Question 30

Where are the alkali metals positioned on the periodic table?

Answer 30

Group 1

Question 31

What is the order of groups in the periodic table?

Answer 31

1,2,3,4,5,6,7,0

Question 32

How did John Dalton arrange the elements in his "Table of Elements"?

Answer 32

In order of atomic weight

Question 33

How many elements did John Dalton know about to include in his "Table of Elements"?

Answer 33

20 elements

Question 34

Name the 3 men who worked to develop a Periodic Table of Elements in the 19th Century

Answer 34

-John Dalton -John Newlands -Dimitri Mendelev

Question 35

What does a group refer to in the periodic table?

Answer 35

A column of elements going down the table

Question 36

What happens to reactivity as you go down group 1?

Answer 36

Reactivity increases

Question 37

How many electrons do group 7 elements gain and what ion do they form?

Answer 37

Gain 1 electron and form a 1-ion

Question 38

How did Mendelev arrange the elements in his table?

Answer 38

By atomic mass and similar properties

Question 39

Why did Mendelev leave gaps in his table?

Answer 39

He predicted elements that had not been discovered yet

Question 40

The average mass of the atoms of an element taking into account all of the isotopes of that element

Answer 40

Relative atomic mass

Question 41

Tomson's plum pudding model (1897)

Answer 41

-Mass of positive charge -Negative electrons

Question 42

Rutherford - Bohr model (1913)

Answer 42

-Positive nucleus containing protons -Negative electrons in shells

Question 43

Chadwick model (1932)

Answer 43

-Positive nucleus containing neutrons and protons -Negative electrons in shells

Question 44

How many electrons does the first shell hold

Answer 44

2

Question 45

How many electrons does the second shell hold

Answer 45

8

Question 46

How many electrons does the third shell hold

Answer 46

8

Question 47

Relative atomic mass of chlorine

Answer 47

**Ar=(35x75.8)+(37x24.2)= | **75.8+24.2