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Fall Chemistry Semester Exam Review

Total questions: 40

Worksheet time: 21mins

Name
Class
Date
1.

Data that is expressed using numbers. Ex. Mass = 25 g

a)

Quantitative Data

b)

Qualitative Data

2.

Data that is expressed using words. Ex. odor, color

a)

Quantitative Data

b)

Qualitative Data

3.

The octet rules states that most elements want to have _____ valence electrons.

a)

2

b)

4

c)

6

d)

8

4.
A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________
a)
ionic formula
b)
covalent formula
c)
empirical formula
d)
molecular formula
5.

Most elements are electronically stable in an octet, but Hydrogen is like Helium and only requires how many electrons?

a)

one

b)

two

c)

four

d)

eight

6.

A statement that can be tested experimentally is a

a)

variable

b)

model

c)

generalization

d)

hypothesis

7.

A theory is accepted as the explanation of an observed phenomenon until

a)

one study contradicts the theory

b)

repeated observations conflict with the theory

c)

a new method is discovered

d)

a leading scientist declares that it is invalid

8.

What is the correct SI unit for mass?

a)

Kilograms

b)

newtons

c)

pounds

d)

liters

9.

What is the correct SI unit for length?

a)

meter

b)

millimeter

c)

centimeter

d)

kilometer

10.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
11.

A mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together is called a(n)

a)

dipole

b)

Lewis structure

c)

chemical bond

d)

London force

12.

The electrons involved in the formation of a chemical bond are called

a)

dipoles

b)

s electrons

c)

Lewis electrons

d)

valence electrons

13.

As atoms bond with each other, they

a)

increase their potential energy, creating less-stable arrangements

b)

decrease their potential energy, creating less-stable arrangements

c)

increase their potential energy, creating more-stable arrangements

d)

decrease their potential energy, creating more-stable arrangements

14.
How are ionic bonds formed?
a)
Transfer of electrons
b)
Sharing of electrons
15.
How are covalent bonds formed?
a)
Sharing of electrons
b)
Transfer of electrons
16.

If 2 covalently bonded atoms are identical, the bond is

a)

nonpolar covalent

b)

polar covalent

c)

dipole covalent

d)

coordinate covalent

17.

If the atoms that share electrons have an unequal attraction for the electrons, the bond is called

a)

nonpolar

b)

polar

c)

ionic

d)

dipolar

18.

A polar molecule contains

a)

ions

b)

a region of positive charge and a region of negative charge

c)

only London forces

d)

no bonds

19.

The forces of attraction between molecules in a molecular compound are

a)

stronger than the forces among formula units in ionic bonding

b)

weaker than the forces among formula units in ionic bonding

c)

about equal to the forces among forula units in ionic bonding

d)

zero

20.

Group which satisfies the octet rule without forming compounds

a)

halogen

b)

noble gas

c)

alkali metal

d)

alkaline-earth metal

21.

Most chemical bonds are

a)

purely ionic

b)

purely covalent

c)

partly ionic and partly covalent

d)

metallic

22.

The electron configuration of nitrogen is 1s2 2s2 2p3. How many more electrons does nitrogen need to satisfy the octet rule?

a)

1

b)

3

c)

5

d)

8

23.

A neutral group of atoms held together by covalent bonds is a

a)

molecular formula

b)

chemical formula

c)

polyatomic ion

d)

molecule

24.

In a molecule of Chlorine, the 2 shared electrons give each chlorine atom how many electrons in the outer energy level?

a)

1

b)

2

c)

8

d)

32

25.

A scientist working with compounds containing carbon is working in the field of ______ chemistry.

a)

inorganic

b)

organic

c)

theoretical

d)

none of the above

26.
The first person to propose a theory about an atom called the Atomos Theory was
a)
Democritus
b)
Rutherford
c)
Dalton
d)
Aristotle
27.

The word 'atom' means

a)

divisible

b)

indivisible

c)

none

28.

The least massive particle in an atom is the

a)

proton

b)

neutron

c)

electron

d)

nucleus

29.

If the atoms that share electrons have an unequal attraction attraction for the electrons, the bond is called

a)

nonpolar

b)

polar

c)

ionic

d)

dipolar

30.

Noble gases are generally ______.

a)

semiconductors

b)

malleable

c)

brittle

d)

unreactive

31.

Vertical columns on the periodic table are called ___?

a)

groups

b)

periods

c)

rows

d)

families

32.

Horizontal rows on the periodic table are called ___?

a)

groups

b)

periods

c)

rows

d)

families

33.

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

a)

2

b)

4

c)

6

d)

8

e)

10

34.
If an atom has an equal number of protons and electrons it is a...
a)
Positive ion
b)
Negative ion
c)
Isotope
d)
Neutral atom
35.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

36.
Valence electrons are the...
a)
Innermost electrons
b)
Middle electrons
c)
Outermost electrons
d)
Any electrons
37.

A(n) ____________ is made up of a neutral group of atoms held together by a covalent bond.

a)

atom

b)

molecule

c)

electron

d)

element

38.

A polar molecule contains

a)

ions

b)

a region of positive charge and a region of negative charge

c)

only London forces

d)

no bonds

39.

Most chemical bonds are

a)

purely ionic

b)

purely covalent

c)

partly ionic and partly covalent

d)

metallic

40.

If 2 covalently bonded atoms are identical, the bond is

a)

nonpolar covalent

b)

polar covalent

c)

dipole covalent

d)

coordinate covalent

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