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Elements & Compounds Recap

Total questions: 23

Worksheet time: 16mins

Name
Class
Date
1.
Carbon is considered an element while carbon dioxide is considered a compound. This is because carbon dioxide is –
a)
a gas at room temperature.
b)
made of two different elements.
c)
given off by green plants.
2.
Compounds are different than elements because compounds are -
a)
A combination of two or more elements.
b)

B)not able to be broken down into parts
c)
made from the same type of atoms
d)
a pure substance, elements are not
3.
Use the periodic table to determine the Chemical symbol for Iron.
a)
 Ir
b)
FE
c)
Fe
d)
I
4.
The smallest particle of any particular type of matter is known by which of the following terms?
a)
Element
b)
Chemical
c)
Atom
d)
Substance
5.

Element, mixture, or compound?

a)

element

b)

mixture

c)

compound

6.

What kind of substance is composed of two or more elements that are chemically combined?

a)

element

b)

mixture

c)

solution

d)

compound

7.

Is salt (NaCI) a compound or an element?

a)

Compound

b)

element

8.
All matter is made of .....
a)
energy 
b)
atoms 
c)
air
d)
chemistry
9.

Which of diagram represents(s) an element?

a)

A. W only

b)

B. Z only

c)

C. X and Z only

d)

D. X, Y and Z only

10.

A pure substance

a)

elements

b)

mixtures

c)

compounds

d)

elements and compounds

e)

elements and mixtures

11.

Which of the following statements is true about elements?

a)

Elements can be broken down into simpler substances.

b)

Elements are always found in a gaseous state.

c)

Elements are made up of different types of atoms.

d)

Elements are pure substances.

12.

Element, mixture, or compound?

a)

element

b)

mixture

c)

compound

13.

Element, mixture, or compound?

a)

element

b)

mixture

c)

compound

14.
How many elements are represented in the compound?
Na2CO3
a)
1
b)
2
c)
3
d)
4
15.

Which one of the following is a compound?

a)

NaCl

b)

O2

c)

Hydrogen

d)

He2

16.

What elements made up the compound Carbon dioxide?

a)

Carbon and Oxide

b)

Carbon and Oxygen

c)

Carbon and Hydrogen

d)

Carbon and Carbon

17.

"Na" is the element's

a)

Chemical Formula

b)

Compound

c)

Name

d)

Chemical Symbol

18.
How many different elements are represented in the compound?
CH4
a)
1
b)
2
c)
3
d)
4
19.
Most of the elements on the periodic table are classified as _____.
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Periods
20.

A pure substance is made of two or more elements chemically combined is a(n)

a)

element

b)

compound

c)

mixture

21.

Is METHANE (CH4) an element or a compound?

a)

ELEMENT

b)

COMPOUND

22.
a)
Element
b)
Compound
c)
Mixture
23.
a)
Element
b)
Compound
c)
Mixture

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