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Honors Biology Midterm Review - Unit 2

Total questions: 51

Worksheet time: 40mins

Name
Class
Date
1.

The subatomic particle not found in the nucleus is the

a)

proton

b)

neutron

c)

isotope

d)

electron

2.

How many atoms are present in the molecule C3H6O3?

a)

1

b)

6

c)

12

d)

3

3.

If an atom contains a different number of neutrons than a "normal" atom, it is called a(n)...

a)

isotope

b)

ion

c)

element

d)

isomer

4.

How many total molecules are in this equation?

a)

3

b)

5

c)

6

d)

16

5.

How many total atoms are on the reactant side of the equation?

a)

4

b)

6

c)

8

d)

16

6.

Type of bonds that are formed when atoms donate or "steal" electrons from other atoms

a)

hydrogen

b)

covalent

c)

ionic

d)

peptide

7.

The type of force created when water molecules are attracted to other water molecules

a)

adhesion

b)

cohesion

c)

capillary action

d)

transpiration pull

8.

When there are more hydrogen ions in solution than hydroxide ions, the solution is

a)

acidic

b)

basic

c)

neutral

9.

A solution that has a pH of 5.4 is ...

a)

acidic

b)

basic

c)

neutral

10.

What is the atomic mass of an atom of fluorine?

a)

9

b)

10

c)

18.9984

d)

9.9984

11.

What is the number of protons in an atom of fluorine?

a)

9

b)

10

c)

18

d)

19

12.
When two substances are mixed, the substance that is dissolved is called the:
a)
solvent
b)
solute
13.

Describe COHESION.

a)

Water molecules attracted to other substances.

b)

Water molecules climbing upwards against the force of gravity.

c)

Water molecules dissolving many substances because of its polarity.

d)

Water molecules attracted to other water molecules.

14.

Describe ADHESION.

a)

Water molecules attracted to other substances.

b)

Water molecules climbing upwards against the force of gravity.

c)

Water molecules dissolving many substances because of its polarity.

d)

Water molecules attracted to other water molecules.

15.

Describe SURFACE TENSION.

a)

Water molecules climbing upwards against the force of gravity.

b)

Water molecules dissolving many substances because of its polarity.

c)

Measure of how difficult it is to break the surface of a liquid.

d)

Water molecules attracted to other substances.

16.
Which statement describes the polarity of a water molecule?
a)
The oxygen end has slight positive charge and the hydrogen end has a slight negative charge
b)
The oxygen end has a slight negative charge and the hydrogen end has a slight positive charge
c)
Electrons are shared evenly between the hydrogens and the oxygen.
d)
The charge on each end of the molecule is balanced.
17.

The primary forces of attraction between water molecules in are

a)

ionic bonds

b)

hydrogen bonds

c)

polar covalent bonds

d)

nonpolar covalent bonds

18.

The order of elements in the periodic table is based on

a)

the number of protons in the nucleus.

b)

the electric charge of the nucleus.

c)

the number of neutrons in the nucleus.

d)

atomic mass.

19.
What is the atomic number of this atom?
a)
1
b)
3
c)
4
d)
7
20.

How many protons are in a sodium atom, Na? (tap to enlarge the periodic table)

a)

Sodium has 1 proton.

b)

Sodium has 3 protons.

c)

Sodium has 11 protons

21.

An element has the mass number 12 and atomic number 6. The number of neutrons in it is:

a)

6

b)

10

c)

4

d)

8

22.

Atoms of the same element which have a different number of neutrons are called _________________.

a)

ions

b)

isotopes

c)

quarks

d)

molecules

23.

Which subatomic particle has a negative charge in the atom?

a)

proton

b)

neutron

c)

electron

d)

quark

24.

If an atom has 10 electrons, how many protons does it have?

a)

0

b)

1

c)

10

d)

5

25.
Measure mainly of the nuclear particles: protons + neutrons
a)
Subatomic Particles
b)
Atomic Number
c)
Atomic Mass
d)
Gluons
26.
A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass
a)
Electron Shells
b)
Orbitals
c)
Electron Cloud
d)
Nucleus
27.

How many protons and electrons does this element have?

a)

35

b)

18

c)

17

d)

52

28.

How many neutrons does calcium have?

a)

20

b)

40

c)

60

d)

0

29.

What do we call a substance composed of atoms of a singular type?

a)

cell

b)

proton

c)

element

d)

atom

30.

Which term represents the particle that is formed when 2 or more atoms come together as one?

a)

atoms

b)

elements

c)

molecules

d)

compounds

31.

What is the term used for the substances that are formed when 2 or more atoms from differing elements come together?

a)

atoms

b)

elements

c)

molecules

d)

compounds

32.

TRUE OR FALSE:

Every compound is a molecule and every molecule is a compound.

a)

TRUE

b)

FALSE

33.

What is sugar? (C6H12O6)

a)

element

b)

compound

c)

mixture

34.
How many nitrogen atoms in 
Mg(NO3)2
a)
1
b)
2
c)
3
d)
6
35.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
36.
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
37.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
38.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
39.

Molecules that have a positively charged side and a negatively charged side are called ____ molecules.

a)

polar

b)

nonpolar

c)

imbalanced

d)

weird

40.

Solid water (ice) is ____ dense than liquid water and therefore it floats.

a)

MORE

b)

LESS

41.
Hydrogen bonding between two different molecules (like water a and cellulose of grass).  
a)
cohesion
b)
adhesion
42.
Acids have
a)
a high PH 
b)
a low PH
43.
The lower the pH, the greater the concentration of :
a)
OH-
b)
H+
44.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
45.
A pH of 14 is a .....
a)
strong acid
b)
weak acid
c)
Strong base
d)
Weak base
46.
The table below shows the pH of several solutions. Which solution has the greatest concentration of H+ ions?
a)
vinegar
b)
milk
c)
water
d)
bleach
47.

An acidic solution has a

a)

higher concentration of hydrogen ions than hydroxide ions

b)

higher concentration of hydroxide ions than hydrogen ions

c)

equal concentration of hydrogen ions and hydroxide ions

48.

A basic ( alkaline ) solution has a

a)

higher concentration of hydrogen ions than hydroxide ions

b)

equal concentration of hydroxide ions and hydrogen ions

c)

higher concentration of hydroxide ions than hydrogen ions

49.
The substance being dissolved in a solution.
a)
sands
b)
solute
c)
solvent
d)
alloy
50.
The substance in which a solute is dissolved
a)
sands
b)
solvent
c)
alloy
d)
negative particles
51.

If I dissolve carbon dioxide in water, what is the solvent?

a)

Carbon Dioxide

b)

There is no solvent

c)

Oxygen

d)

Water

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