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Atoms, elements, mixtures, compounds

Total questions: 47

Worksheet time: 25mins

Name
Class
Date
1.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
2.
Is water an element or a compound?
a)
Element
b)
Compound
3.
The properties of the elements that make up a compound are usually very similar to the compound itself.
a)
True
b)
False
4.
Water (H2O) freezing is an example of:
a)
A chemical change
b)
A physical change
5.
A compound consists of two or more elements bound together.
a)
True
b)
False
6.
Is Iron (Fe) an element or a compound?
a)
Element
b)
Compound
7.
What is this element...Au
a)
Iron
b)
Titanium
c)
Gold
d)
Flourine
8.
What is the symbol for Calcium
a)
Cl
b)
Ca
c)
Cm
d)
ca
9.
Element is a
a)
pure substance
b)
compound
c)
mixture
d)
molecule
10.
How many elements are in HHe
a)
3
b)
4
c)
2
d)
5
11.

In the diagrams provided, the circles of different colors represent the atoms of different elements. Which diagram represents a mixture?

a)

I

b)

II

c)

III

d)

IV

12.

Which beaker contains only one type of element?

a)

A

b)

B

c)

C

d)

D

13.

Which is the best description of one particle of table salt (NaCl)?

a)

mixture

b)

compound

c)

element

14.
Classify the sample
a)
Pure substance
b)
Mixture
15.
Classify the sample
a)
Element
b)
Compound
16.

The smallest particle into which an element can be divided and still be the same element is a(n)

a)

proton

b)

neutron

c)

electron

d)

atom

17.

Which subatomic particle has a negative charge?

a)

proton

b)

neutron

c)

electron

d)

atom

18.

Which subatomic particle has a positive charge?

a)

proton

b)

nuetron

c)

electron

d)

atom

19.

The center of the atom is

a)

The neutron

b)

The nucleus

c)

The proton

d)

The electron

20.

How many atoms of sulfur are in each molecule of H2SO4?

a)

1

b)

4

c)

2

d)

7

21.

Alanine is an amino acid with formula C3H7NO2. How many atoms in all are in each molecule of alanine?

a)

3

b)

7

c)

12

d)

13

22.

How many atoms of hydrogen are in a molecule of glucose (C6H12O6)?

a)

12

b)

6

c)

18

d)

4

23.

Which of the following accurately describes the chemical formula of the molecule shown above?

a)

3CH8O

b)

C3H7O

c)

C4H8O2

d)

C3H8O

24.

A diagram to a molecule is shown above. Based on the diagram, what is the identity of this compound?

a)

Water (H2O)

b)

Hydronium (H3O+)

c)

Hydrogen peroxide (H2O2)

d)

Hydroxide (OH-)

25.

How many atoms of hydrogen are in the formula CH3CH2Br?

a)

5

b)

3

c)

2

d)

7

26.
Element or Compound?
H2O
a)
Element
b)
Compound
27.
Which of the following represents an element?
a)
H2O
b)
H2
c)
NaCl
d)
CaCO3
28.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
29.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
30.

What is this?

a)

Atoms of an element

b)

Mixture

c)

Compound

d)

Molecules

31.

What is this?

a)

Atoms of an element

b)

Compounds

c)

Molecules of an element

d)

Mixture

32.

This is

a)

an atom.

b)

a molecule.

c)

a compound.

d)

a mixture.

33.

What is this?

a)

A compound

b)

A mixture

c)

An atom

d)

An element

34.

This is

a)

an atom.

b)

a molecule of a compound.

c)

an element.

d)

a mixture.

35.
All matter is composed of (contains) at least one element on the periodic table
a)
True
b)
False
36.
What is the chemical symbol for the element hydrogen
a)
H
b)
He
c)
h
d)
he
37.
What is the chemical symbol for the element Silicon
a)
S
b)
Si
c)
si
d)
Sl
38.
What is the chemical symbol for the element Carbon
a)
ca
b)
co2
c)
C
d)
Cd
39.
What is the chemical symbol for the element copper?
a)
co
b)
c
c)
Cu
d)
cu
40.
What is the chemical symbol for the element Aluminum
a)
A
b)
AL
c)
Al
d)
al
41.
What is the chemical symbol for the element Nitrogen
a)
Ni
b)
N
c)
No
d)
Nb
42.
What is the chemical symbol for the element Silver
a)
S
b)
Si
c)
Au
d)
Ag
43.
What is the chemical symbol for the element oxygen
a)
O
b)
Oxy
c)
ox
d)
Oy
44.
What is the chemical symbol for the element Chlorine
a)
C
b)
Cl
c)
cl
d)
Ch
45.
What is the chemical symbol for the element Gold
a)
G
b)
go
c)
AU
d)
Au
46.
What element is represented by the Chemical symbol Mg
a)
Manganese
b)
Magnesium
c)
Molybdenum
d)
Mitrium
47.
What is the chemical symbol for the element Iron
a)
I
b)
Ir
c)
Fe
d)
fe

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