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Elements & Compounds

Total questions: 30

Worksheet time: 15mins

Name
Class
Date
1.
What are the three states of matter?
a)
ice, water, vapour
b)
solid, liquid, gas
c)
mercury, helium, sodium
d)
atom, element, molecule
2.
This is the particles arrangement for 
a)
solid
b)
liquid
c)
gas
d)
Periodic Table
3.
What are the elements found in Sodium chloride (NaCl)?
a)
Potassium and chlorine
b)
Sodium, iodine and carbon
c)
Sodium and chloride
d)
Sodium and chlorine
4.
These are properties of liquid, EXCEPT
a)
has definite mass
b)
particles are far apart
c)
flows easily
d)
has definite volume
5.
Melting point refers to
a)
temperature at which solid turns to gas
b)
temperature at which gas turns into liquid
c)
temperature at which solid turns into liquid
d)
temperature at which liquid turns into gas
6.
The boiling point of mercury is 356°C. What is the state of mercury at 360°C?
a)
Solid
b)
Liquid
c)
Gas
7.
The melting point of sodium is 98°C. What is the state of sodium at 80°C?
a)
Solid
b)
Liquid
c)
Gas
8.
Condensation is when gas changes into
a)
solid
b)
liquid 
c)
gas
9.
Diffusion is the movement of particles from 
a)
liquid to gas
b)
low concentration to high concentration area
c)
high concentration to a low concentration area
d)
solid to g
10.
Chemical symbols for Magnesium, Aluminium and Calcium are
a)
Mg, Al, C
b)
AT, Ma, Cl
c)
Mg, Al, Cl
d)
Al, Mg, Ca
11.
Choose the answer which contains ONLY elements.
a)
carbon dioxide, carbon, boron
b)
water, calcium, bromine
c)
hydrogen, carbon dioxide, paper
d)
gold, silver, iron
12.
Which is a compound?
a)
H2
b)
CO2
c)
Cl2
d)
Br
13.
Pressure will increase by 
a)
increasing number of particles only
b)
increasing number of particles and temperature
c)
increasing the temperature only
d)
changing the types of particles
14.
In which state of matter does diffusion happens most quickly?
a)
Solid
b)
Liquid
c)
Gas
15.
The chemical formula for table sugar (sucrose) is C12H22O11. Name all the elements found in this compound.
a)
Oxygen, carbon, hydrogen
b)
Calcium, helium, iodine
c)
Oxygen, calcium, hydrogen
d)
Helium, carbon, oxygen
16.
Name this compound, KBr.
a)
Potassium bromine
b)
Sodium chlorine
c)
Potassium bromide
d)
Potassium boron
17.
Name all the elements found in this compound, AlNaO2.
a)
potassium, aluminium, oxygen
b)
argon, iodine, sodium, oxygen
c)
potassium, argon, oxygen
d)
oxygen, sodium, aluminium
18.
Copper has an atomic number of 29. This means it
a)
has 29 atoms
b)
is 29g
c)
has 29 protons
d)
has 29 nucleus
19.
There are three subatomic particles. Which subatomic particles form the nucleus?
a)
electrons only
b)
protons and neutrons
c)
protons and electrons
d)
neutrons only
20.
What is the chemical formula for lithium?
a)
Lt
b)
Li
c)
LL
d)
Lm
21.

Sodium is located in

a)

Group 1

b)

Group 2

c)

Group 7

d)

Group 8

22.

Group 7 elements are also known as

a)

metals

b)

metalloids

c)

halogen

d)

nitrogen

23.

Which of the following element is NOT found in NaSO4?

a)

Sodium

b)

Sulfur

c)

Hydrogen

d)

Oxygen

24.

Name the elements that made up lithium hydroxide.

a)

lithium and hydrogen

b)

lithium, hydrogen and oxgen

c)

lithium and hydroxide

d)

lithium, water and oxygen

25.

The chemical name for this compound, N2O4

a)

nitrogen dioxide

b)

nitrogen tetroxide

c)

sodium oxide

d)

dinitrogen tetroxide

26.

Metals are strong because

a)

they are metals

b)

strong forces hold their atoms together

c)

they are in the periodic table

d)

they are bendy

27.

The speed of diffusion increases when

a)

temperature increases

b)

size of particles decreases

c)

mass of particles increases

d)

it happens in solid

28.

When gas is heated, the particles move faster, therefore more collisions happen. This

a)

increases gas pressure

b)

decreases gas pressure

29.

How many hydrogen atoms are found in C6H12O6?

a)

6

b)

12

c)

24

d)

36

30.

Fluorine helps to

a)

reduce the incidence of tooth decay

b)

increase the incidence of tooth decay

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