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Chem review

Total questions: 49

Worksheet time: 30mins

Name
Class
Date
1.

Which subatomic particle has a positive charge?

a)

proton

b)

neutron

c)

electron

d)

midichlorian

2.

The parts of a compound must be combined in a specific ___

a)

color

b)

ratio

c)

location

3.
What is the left part of a chemical equation called?
H2 + O → H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
4.

The atomic number is the number that is usually on the

a)

bottom

b)

top

5.

Covalent compounds

a)

Share electrons

b)

transfer electrons

c)

contain a sea of electrons

d)

conduct electricity easily

6.

Which subatomic particle does the YELLOW circle represent?

a)

proton

b)

neutron

c)

electron

d)

nucleus

7.

A ____________ must be made of elements.

a)

compound

b)

mixture

c)

element

8.

The atomic MASS is the number that is usually on the

a)

bottom

b)

top

9.

Hot chocolate is an example of a(n) ___

a)

compound

b)

molecule

c)

mixture

d)

element

10.
This is used to represent the number of each atom being represented. 
a)
A Exponent
b)
The Coefficient
c)
A Molecule
d)
The Subscript
11.

What type of matter is Rn? (hint look at capital and lower case)

a)

Mixture

b)

Element

c)

Compound

d)

Molecule

12.

How many elements are represented in the compound?

Na2CO3

a)

1

b)

2

c)

3

d)

4

13.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
14.

This picture represents which of the following?

a)

mixture of elements

b)

compound

c)

mixture of compounds

15.

Trail mix is an example of a(n) ___

a)

compound

b)

molecule

c)

mixture

d)

element

16.

Ionic Bonding involves...

a)

The transfer of protons

b)

The transfer of nuetrons

c)

The transfer of electrons

d)

the sharing of electrons

17.

A ____________ is "singular" for element.

a)

atom

b)

molecule

c)

mixture

d)

compound

18.

Water (H2O) is an example of which type of matter?

a)

compound

b)

mixture

c)

element

19.

Which subatomic particle does the RED circle represent?

a)

proton

b)

neutron

c)

electron

d)

nucleus

20.

Elements are represented by chemical symbol. Symbols are written with

a)

all lowercase letters

b)

all capital letters

c)

always only one letter

d)

one capital letter and others lowercase

21.

A __ cannot be separated physically

a)

compound

b)

molecule

c)

mixture

22.

Anything that has mass and takes up space is called

a)

volume

b)

matter

c)

energy

23.

Atoms are made up of what?

a)

molecules

b)

compounds

c)

elements

d)

subatomic particles

24.

The chemicals that you start with are called the

a)

products

b)

reactants

25.

The chemicals AFTER the arrow in a chemical equation are called the

a)

products

b)

reactants

26.

A shorter way to write an element is a

a)

chemical formula

b)

chemical equation

c)

chemical symbol

27.

What is the center of an atom called?

a)

The headquarters

b)

The centrometer

c)

The hypothesis

d)

The nucleus

28.

Which subatomic particle as no charge, also known as a neutral charge?

a)

proton

b)

neutron

c)

electron

d)

dead battery

29.

This picture represents which of the following?

a)

element

b)

compound

c)

mixture

30.

What is a pure substance made of two or more elements that are chemically combined called?

a)

element

b)

compound

c)

mixture

d)

solution

31.

Which particles are inside the nucleus?

a)

protons and electrons

b)

protons and neutrons

c)

electrons and neutrons

d)

protons, electrons, and neutrons

32.

What is the Atomic Number?

a)

Number of Protons in an atom

b)

Number of Elephants in an atom

c)

Number of Atoms in an atom

d)

State of matter of the atom

33.

The chemicals that you end up with are called the

a)

products

b)

reactants

34.

A ______________ is made of elements in a specific ratio.

a)

compound

b)

molecule

c)

mixture

d)

element

35.

What is the smallest unit of an element that still has the properties of the element?

a)

Proton

b)

Neutron

c)

Electron

d)

Atom

36.

If an atom has 7 Protons what is its atomic number?

a)

14

b)

1

c)

7

d)

12

37.

Subtracting the atomic number from the atomic mass will give you

a)

zero

b)

neutrons

c)

electrons

d)

protons

38.

What kind of chemical bond forms a compound with a low melting point?

a)

ionic

b)

covalent

c)

metallic

d)

hydrate

39.

This picture represents which of the following?

a)

element

b)

compound

c)

mixture

40.
In chemical formulas, the number of atoms in a unit of the compound is shown by numbers called ______.
a)
oxidation numbers
b)
superscripts
c)
hydrates
d)
subscripts
41.

What kind of chemical bond forms a compound with a high melting point?

a)

ionic

b)

covalent

c)

magnetic

d)

metallic

42.

What kind of chemical bond forms a compound that conducts electricity easily?

a)

ionic

b)

covalent

c)

metallic

43.

If reactants' mass is 36g , what is the mass of the products?

a)

15

b)

36

c)

81

d)

18

44.

A ____________ CAN be separated physically.

a)

compound

b)

molecule

c)

mixture

45.

A shorter way to write a compound or molecule is a

a)

chemical formula

b)

chemical equation

c)

chemical symbol

46.

Which subatomic particle has a negative charge?

a)

proton

b)

neutron

c)

electron

d)

megatron

47.

In chemical reactions, what does the law of conservation of mass mean?

a)

Matter is not created or destroyed.

b)

The total mass of the reactants is greater than the total mass of the products.

c)

The total mass of the reactants is less than the total mass of the products.

d)

Matter is not changed.

48.

Which compounds are the PRODUCTS of this reaction?

a)

CO2

b)

C6H12O6

c)

O2

d)

H2O

49.

A shorter way to write a chemical reaction is a

a)

chemical formula

b)

chemical equation

c)

chemical symbol

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