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Lesson 2 Final Review

Total questions: 50

Worksheet time: 43mins

Name
Class
Date
1.

Anything that has mass and volume:

a)

Molecule

b)

Atom

c)

Matter

2.

Pure substance that is made of only one type of atom:

a)

Element

b)

Molecule

c)

Compound

3.

Two or more atoms joined together:

a)

Element

b)

Compound

c)

Molecule

4.

What is a compound?

a)

Two different elements bonded together.

b)

Two of the same elements bonded together.

c)

A mixture of different substances.

d)

Two substances stuck together with glue.

5.
The tiniest bit of water that still is water is a molecule of water.
a)
True
b)
False
6.
Hydrogen is a compound.
a)
True
b)
False
7.
Carbon dioxide is a compound.
a)
True
b)
False
8.
A substance that is made up of atoms of more than one element is a _______. 
a)
compound
b)
rust
c)
molecule
9.
The smallest unit of a compound is a ___.
a)
molecule
b)
atom
c)
matter
10.
What is the picture displayed?
a)
atom
b)
element
c)
molecule/compound
d)
cells
11.

What is a molecule?

a)

two elements bonded together (sharing electrons)

b)

a mixture of different substances

c)

smallest individual particles

d)

salt mixed in water

12.

What is the chemical symbol of the element Hydrogen?

a)

Hy

b)

H

c)

Hydro

d)

Hg

13.

Which of the following is a chemical formula?

a)

H2SO4

b)

Si

c)

Hg

d)

C

14.

Which of the following is a chemical symbol?

a)

H2O

b)

O

c)

NaCl

d)

FeO

15.

___________ combine together to form molecules.

a)

atoms

b)

compounds

c)

mixtures

d)

pikmon

16.
What do we call a substance consisting of a single atom?
a)
coefficient
b)
element
c)
compound
d)
molecule
17.
What do we call a chemical substance made up of 2 or more different types atoms bonded together?
a)
formula
b)
atom
c)
subscript
d)
compound
18.
All ____________ are made up of two or more atoms bonded together.
a)
atoms
b)
molecules
c)
electrons
d)
elements
19.
Bonds between atoms in a molecule form as a result of the sharing  of?
a)
formulas
b)
electrons
c)
atoms
d)
chemicals
20.
When __________ form, the elements lose there individual chemical properties and take on new properties.
a)
compounds
b)
atoms
c)
subscript
d)
formula
21.
A recipe for a chemical substance is called a ________ _________.
a)
coefficent
b)
chemical formula
c)
Oxygen
d)
atom
22.
What is a valence electron?
a)
The sum of neutrons and protons.
b)
The # of electrons in the last shell.
c)
A type of bond.
d)
A popular compound.
23.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
24.
Are these molecules also compounds?
a)
YES
b)
NO
25.
Are these molecules also compounds?
a)
YES
b)
NO
26.
How many carbon atoms are there in a methane molecule? 
a)
0
b)
1
c)
4
d)
5
27.
Carbon dioxide (CO2) contains how many atoms of oxygen?
a)
0
b)
1
c)
2
d)
3
28.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
29.
What term is used for the joining of atoms to form new substances?
a)
valence electrons
b)
physical bonding
c)
energy level
d)
chemical bonding
30.

How would H2O be classified? Check all that apply.

a)

Atom

b)

Molecule

c)

Compound

31.

How would O2 be qualified. Check all answers that apply.

a)

Atom

b)

Molecule

c)

Compound

32.

How many valence electrons are in the element Carbon?

a)

2 electrons

b)

6 electrons

c)

4 electrons

d)

None of the above

33.

Why do all bonds form?

a)

To fill up the outer shell.

b)

To achieve the one or duplet electronic configuration

34.

An atom with 1 valence electron 'needs' a full shell, so it can either gain 7 electrons or lose 1. Which is more likely to occur?

a)

lose 1 electron

b)

gain 7 electrons

35.

Atoms are most stable when their outer shell is full or complete.

a)

True

b)

False

36.

What part of an atom is involved in chemical bonding?

a)

proton

b)

neutron

c)

electron

37.

The vertical (up and down) columns in the Periodic Table are called

a)

groups

b)

towers

c)

periods

d)

atomic numbers

38.

All of the elements in a period have the same number of _____.

a)

energy levels

b)

valence electrons

c)

protons

d)

electrons

39.

All of the elements in a group have the same number of _____.

a)

energy levels

b)

valence electrons

c)

protons

d)

electrons

40.

Which is the correct Bohr model for Nitrogen (N)

a)

true

b)

false

41.

C3H5(NO3)3

a)

C = 3, H = 5, N = 3, O = 9

b)

C = 3, H = 5, N = 1, O = 9

c)

C = 9, H = 15, N = 3, O = 9

d)

C = 9, H = 15, N = 1, O = 3

42.

Classify this model.

a)

Atoms of elements.

b)

Molecules of a compound.

c)

Molecules of an element.

d)

Mixture

43.

Carbon (C) and Hydrogen (H) are pure substances. Each is made of only one type of atom though Carbon atoms are different from Hydrogen atoms. Carbon and Hydrogen can chemically combine to form methane (CH4). Which of the following statements is true.

a)

Methane is an element and Carbon and Hydrogen are compounds.

b)

Carbon, Hydrogen, and Methane are all elements.

c)

Carbon, Hydrogen, and Methane are all compounds.

d)

Carbon and Hydrogen are elements and Methane is a compound.

44.

The small number to the right of an element in a chemical formula (like H2) is called ---

a)

a subscript

b)

a coefficient

c)

a variable

d)

a divisor

45.

→ 2H2O

This number tells how many molecules are in a chemical equation.

a)

coefficient

b)

subscript

c)

compound

d)

element

46.

H2O2← ?

This number tells the number of atoms present.

a)

coefficient

b)

molecule

c)

subscript

d)

atom

47.

A subscript is the small number below the element symbol that tells the number of _______ of that element.

a)

atoms

b)

valence electrons

c)

protons

d)

elements

48.

How many atoms are present if there is no subscript following the element symbol?

a)

0

b)

2

c)

only 1

d)

1 million

49.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
50.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct

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