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PS.8 EOG Review 2

Total questions: 50

Worksheet time: 28mins

Name
Class
Date
1.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
2.

This picture represents which of the following?

a)

A single element

b)

Mixture of molecules

c)

mixture of atoms

d)

mixture of compounds

3.
Structural differences between different chemicals can be represented in models of the particles. Which drawing BEST represents a compound?
a)
b)
c)
d)
4.

An example of a pure substance is

a)

gold

b)

salad

c)

sweet tea

d)

electron clouds

5.

The basic building blocks of most of the matter around you.

a)

elements

b)

protons

c)

atoms

d)

electrons

6.

The center of an atom is called the

a)

proton

b)

electron

c)

neutron

d)

nucleus

7.

protons are

a)

located in the nucleus and have a positive charge

b)

located in the nucleus and have a negative charge

c)

the most important part of an atom

d)

atoms

8.

In an element

a)

there are many different substances

b)

the atoms are all the same

c)

the atoms are all different

d)

the electrons, protons and neutrons are located in the nucleus

9.

Identify the heterogeneous mixture

a)

sweet tea

b)

salad

c)

jello

d)

gold

10.

1 A substance made up of two or more chemically combined elements is —

a)

an element

b)

mixture

c)

compound

d)

solution

11.
NaHCO3 is an example of —
a)
an abbreviation
b)
a compound
c)
a mixture
d)
an element
12.
Classify the picture with the correct label.
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
13.

What does this illustrate

a)

Elements

b)

Compunds

c)

Mixture of Elements and Compunds

d)

Mixture of Compounds

14.

Brass is a metal that is bright red and gold. It is formed by combining, not chemically, two elements, zinc and copper. Based on the information, how would brass be classified?

a)

an element

b)

compound

c)

mixture

d)

suspension

15.

This diagram represents a _____.

a)

Element

b)

Compound

c)

Mixture of compound and element

d)

Mixture of two elements

16.

Because an element can not be broken down into a simpler substance, it is considered to be

a)

a chemical impurity

b)

a chemical substance

c)

a pure substance

d)

unbreakable

17.

protons are

a)

located in the nucleus and have a positive charge

b)

located in the nucleus and have a negative charge

c)

the most important part of an atom

d)

atoms

18.

electrons are

a)

located in the nucleus and have a positive charge

b)

located in the nucleus and have a negative charge

c)

located in the electron cloud and have a negative charge

d)

located in the electron cloud and have a positive charge

19.

Identify the heterogeneous mixture

a)

sweet tea

b)

salad

c)

jello

d)

gold

20.

Identify the homogeneous mixture

a)

milk

b)

trail mix

c)

calcium

d)

sugar

21.

Which of the following is not a compound

a)

aluminum (Al)

b)

salt (NaCl)

c)

water (H2O)

d)

sugar (C6H12O6)

22.

Atoms move quickly and randomly in which state of matter?

a)

solid

b)

liquid

c)

gas

d)

none of these

23.

Atoms move freely and take the shape of the container in which state of matter?

a)

solid

b)

liquid

c)

gas

d)

none of these

24.

Atoms vibrate and packed tightly together in which state of matter?

a)

solid

b)

liquid

c)

gas

d)

none of these

25.

Carbon and oxygen combine chemically to form carbon dioxide. Carbon dioxide is

a)

an ion

b)

a nucleus

c)

a compound

d)

an atom

26.

A student passes a magnet over 10 grams of a powder. Four grams of the powder stick to the magnet, while 6 grams do not. Which of these identifies the substance?

a)

element

b)

compound

c)

mixture

d)

solution

27.

Sodium (Na) and chlorine (Cl) combine to form sodium chloride (NaCl), which is commonly known as

a)

soap

b)

table salt

c)

vinegar

28.

The table above shows several minerals found in Earth’s crust. Based on the information in the table, which mineral is also an element?

a)

graphite

b)

quartz

c)

calcite

d)

hematite

29.

A student studies four chemicals in a laboratory investigation. Which chemical cannot be further broken down into other chemicals using ordinary laboratory processes?

a)

1

b)

2

c)

3

d)

4

30.

Which is a compound?

a)

Nitrogen (N2)

b)

Neon (Ne)

c)

Ozone (O3)

d)

Ammonia (NH3)

31.
If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?
a)
12 atoms of carbon (C)
b)
6 atoms of carbon (C)
c)
3 atoms of carbon (C)
d)
2 atoms of carbon (C)
32.
What coefficient for O2 demonstrates the law of conservation of mass?
CH4(g) + __O2(g) → CO2(g) + 2H2O(g)
a)
1
b)
2
c)
3
d)
4
33.
Which equation is balanced according to the Law of Conservation of Mass?
a)
NaCl + Mg →
 MgCl2 + Na
b)
2NaCl + Mg → MgCl2 + Na
c)
2NaCl + Mg →
MgCl2 + 2Na
34.
Which of the following is NOT a clue that a chemical reaction has taken place?
a)
Changing size
b)
Changing color
c)
A gas being formed
d)
Formation of a precipitate
35.
CaCO3 represents a chemical
a)
Symbol
b)
Formula
c)
Subscript
d)
Reaction
36.
How many Oxygen (O) atoms are in 2C2HO8Cl2
a)
2
b)
16
c)
8
d)
5
37.

C2H6 + 5O2 → 2CO2 + 3H2O2C_2H_6\ +\ 5O_2\ \rightarrow\ 2CO_2\ +\ 3H_2O_2  
Given this chemical equation, what are the REACTANTS?

a)

C2H6 and 5O2C_2H_{6\ }and\ 5O_2  

b)

2CO2 and 3H2O22CO_2\ and\ 3H_2O_2  

38.
 Fill in the blank to balance the chemical equation. 
2KI  +  ____Cl2 →  2KCl  +  I2
a)
1
b)
2
c)
3
d)
4
39.
What coefficient should go in the blank space to balance the chemical equation? 
2Al  +____  HCl   →    2AlCl3  +  3H2
a)
2
b)
4
c)
3
d)
6
40.

The number of protons and neutrons in the atom is its

a)

atomic mass.

b)

atomic number.

c)

atomic power.

d)

atomic clock.

41.

The element sodium appears like this in the periodic table. Which is its chemical symbol?

a)

11

b)

Na

c)

sodium

d)

22.990

42.

The periodic table contains rows and columns. What are the horizon rows called?

a)

groups

b)

families

c)

columns

d)

periods

43.

What are the columns of the periodic table called?

a)

periods

b)

rows

c)

tables

d)

groups or families

44.

How many groups does the periodic table contain?

a)

2

b)

3

c)

18

d)

32

45.

Properties such as magnetism, luster, and malleability have been used to group together which category of elements on the periodic table?

a)

metals

b)

nonmetals

c)

metaloids

d)

noble gases

46.

If a highly-reactive metal with one valence electron is discovered, in which group would the element best fit?

a)

group 1

b)

group 2

c)

group 17

d)

group 18

47.

An engineer needs a hard, non-magnetic semiconductor. Which element would best fit this description?

a)

aluminum (Al)

b)

carbon (C)

c)

silicon (Si)

d)

silver (Ag)

48.

Which best explains how the periodic table is used to identify properties of elements?

a)

by the color and shape of the elements

b)

by the number of electrons in the elements

c)

by the group in which the elements are located

49.

In which groups did Mendeleev most likely place highly-reactive elements?

a)

group 1 (IA) and group 17 (VIIA)

b)

group 1 (IA) and group 18 (VIIIA)

c)

group 2 (IIA) and group 18 (VIIIA)

50.

Sodium reacts with water. Which element is most likely to have a similar effect to sodium if it is exposed to water?

a)

Carbon

b)

Oxygen

c)

Lithium

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