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Year 8 Chemistry Formative Quiz

Total questions: 48

Worksheet time: 43mins

Name
Class
Date
1.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
2.
What is the atomic number of this atom?
a)
1
b)
3
c)
4
d)
7
3.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

4.

How many protons are in a sodium atom, Na? (tap to enlarge the periodic table)

a)

Sodium has 1 proton.

b)

Sodium has 3 protons.

c)

Sodium has 11 protons

5.

Which subatomic particle has a negative charge in the atom?

a)

proton

b)

neutron

c)

electron

d)

quark

6.

How many electrons are in an atom with an atomic number of 50?

a)

5

b)

8

c)

50

d)

2

7.
How many neutrons in C-14?
a)
6
b)
7
c)
14
d)
8
8.

What is the mass number and atomic number ?

a)

Mass number = 7, atomic number = 14

b)

Mass number = 14, atomic number = 7

9.

What is the relative mass of a neutron?

a)

1 amu

b)

10 amu

c)

0.1 amu

d)

1/1837 amu

10.

What is the relative mass of an electron?

a)

1 amu

b)

10 amu

c)

0.1 amu

d)

1/1837 amu

11.

Which variable should be on the x axis?

a)

dependent variable

b)

independent variable

c)

control variable

12.

The independent variable is the ONE thing you _____

a)

change

b)

keep the same

c)

experiment with

d)

investigate

13.
How many students were surveyed?
a)
8
b)
7
c)
6
d)
9
14.

Which variable should be on the y axis?

a)

the dependent variable

b)

the independent variable

c)

the control variable

15.
Which of the following is a prediction based on a question?
a)
Inference
b)
Observation
c)
Hypothesis
d)
Prediction
16.
Contains only one kind of atom.
a)
Element
b)
Compund
c)
Mixture
17.
Contains two or more atoms combined
a)
Elements
b)
Compounds
c)
Mixtures
18.
Elements can be broken down into simpler substances. 
a)
false 
b)
true 
c)
sometimes 
19.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
20.
Which of the following is an element?
a)
Sugar
b)
Salt
c)
Water
d)
Oxygen
21.

Humans absorb oxygen from the air they breathe in and exhale carbon dioxide gas, CO2. Carbon dioxide gas is

a)

an element made of carbon and oxygen atoms.

b)

a solution made of carbon and oxygen atoms.

c)

a compound of carbon and oxygen atoms.

d)

a mixture of carbon and oxygen atoms.

22.

Which example is a compound?

a)

N2

b)

O2

c)

Cu

d)

H2O2

23.
Particles in a _____________ are tightly packed together.
a)
solid
b)
liquid
c)
gas
d)
plasma
24.
As particles are exposed to warmer temperatures they __________
a)
speed up
b)
slow down
c)
stay the same
d)
vibrate
25.
What am I? I have a fixed mass, a fixed volume, I cannot be squashed and I have a shape that changes to fit the bottom of my container?
a)
solid
b)
liquid
c)
gas
d)
plasma
26.
An inflated balloon is placed in a refrigerator. Which statement describes the movement of the gas particles in the balloon?
a)
The particles move more slowly and become closer together.
b)
The particles move more slowly and become further apart.
c)
The particles move faster and become closer together.
d)
The particles move faster and become further apart. 
27.

Which are of the following are subatomic particles. Select three:

a)

Protons

b)

Neutrons

c)

Electrons

d)

Nucleus

28.

Silicon has an atomic number of 14 and an atomic mass of 28. How many neutrons does it have?

a)

14

b)

28

c)

2

d)

10

29.

Which of the following are properties of a metal: (you should select more than one)

a)

Good conductor of heat and electricity

b)

Brittle (break easily)

c)

Malleable (able to bend without breaking)

d)

Luster (shiny)

e)

Dull

30.

This element is found in group 2, period 3:

a)

Li

b)

Mg

c)

Be

d)

B

31.

Valence electrons are:

a)

Just the electrons on the last energy level (outer shell)

b)

All the electrons in the atom

32.

Which of the following is the electron configuration for Magnesium, Mg? (Atomic number 12)

a)

2-4-4

b)

2-8-2

c)

2-8

d)

2-4-6

33.

The nucleus of an atom contains which of the following subatomic particles: (Select two)

a)

protons

b)

Neutrons

c)

Electrons

d)

Shells

34.

Name an Element that is a Noble Gas. (Full name, not symbol)

(a)  

35.

Ni is the symbol for what element?

(a)  

36.

What is the atomic symbol for Silver?

(a)  

37.

What is Letter 'C' pointing to?

(a)  

38.

What is Letter 'A' pointing to?

(a)  

39.

What is Letter 'b' pointing to?

(a)  

40.

What is Letter 'a' pointing to?

(a)  

41.

How many Carbon (C) atoms are in 4K2CO34K_2CO_3  

a)

1

b)

4

c)

8

d)

12

42.

How many Hydrogen (H) atoms are in  4Al(OH)34Al\left(OH\right)_3  

a)

3

b)

4

c)

7

d)

12

43.

How many Oxygen (O) atoms are present in  6Ba(MnO4)26Ba\left(MnO_4\right)_2  

a)

4

b)

8

c)

24

d)

48

44.

Which of these statements are incorrect about   3NaHCO33NaHCO_3  

a)

There are 3 Sodium atoms

b)

There are 3 Hydrogen atoms

c)

There are 9 Cobalt atoms

d)

There are 3 Carbon atoms

45.

Which of these statements (more than one) are correct about 4Au(IO3)34Au\left(IO_3\right)_3 ? 

a)

There are 4 Gold atoms

b)

There are 12 atoms of Iodine

c)

There are 12 atoms of Oxygen

d)

There are 4 atoms of Uranium

46.

Explain why Co and CO are different.

4 lines
47.

Which of these models represents a gas? Justify your answer

4 lines
48.

Describe the properties of a liquid. Refer to the terms 'shape' and 'volume'.

4 lines

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