Health Sciences 1110
Module 2 Inorganic Chemistry
LAB 2
Use your notes or textbook to answer the questions on your lab worksheet
Chemistry of Life
o Click on the “Chemistry of Life” link on the Lab Web page.
o Participate in the lessons titled: Atom Structure, Ions, Molecules,
Kinds of Bonds, Covalent Bonds, and Ionic Bonds
o Answer the quiz questions on your worksheet.
o Click on Water
o Participate in all of the lessons under Water
ƒ (Do only page 1 under solutions.)
o Answer the quiz questions on your worksheet.
Interactive Physiology
o Go to the Health Sciences Lab Website* and click on the Interactive
Physiology Link.
o username: biomedcorelab (all one word, no spaces)
o Password: waldo
o Click login
o Click the Fluids and Electrolytes button
o Click on the Introduction to Body Fluids button
ƒ Do pages 1-12
ƒ Take the quiz at the end of the lesson
o Click on the Acid/Base Homeostasis button
ƒ Do pages 1-15
* http://chpweb.weber.edu/hthsci/labpages
Hthsci 1110 Lab 2
1.
A(n)
element.
2.
A proton has a
3.
An electron has a
4.
A neutron has a
5.
The Periodic Table is arranged in order of what?
6.
The vertical columns in the periodic table are called
7.
The horizontal rows in the periodic table are called
8.
The atomic number is
9.
The mass number is
10.
The Total Atomic Mass is made up of what?
11.
99.9% of the mass of each atom is in the
12.
What is found in the nucleus of an atom?
13.
Oxygen has a mass number of
14.
Atoms of one element always have the same number of
but can have different numbers of
or
15.
is the smallest particle that retains the properties of that
charge.
charge.
charge.
.
.
.
.
.
and an atomic number of
.
.
.
Atoms that have the same number of protons, different numbers of neutrons,
and different mass numbers are called
.
Hthsci 1110 Lab Assignment Module 2
Page 2
Chemistry of Life
Atoms and Molecules Quiz Questions
1. The mass number of an atom is 15, and its atomic number is 7. The atom probably has
a. 7 electrons in the nucleus.
b. 7 units of negative charge in the nucleus.
c. at least 15 electrons
d. 8 neutrons in the nucleus.
e. About as much mass in electrons as in proteins
2.
Which statement is true of atoms?
a. electrons determine the atom’s size.
b. most of an atom’s volume is filled with matter.
c. protons repel electrons.
d. protons attract other protons.
e. all of the above are correct.
3.
Dr. Jones says an atom has 3 electrons in the first shell and four electrons in the
second shell. Someone should tell Dr. Jones that
a. the second shell can’t have 4 electrons.
b. the first shell must fill before the second shell can have electrons.
c. no shell can hold more than 2 electrons.
d. the second shell should have 8 electrons.
e. the first shell shouldn’t have 3 electrons.
4.
Which statement is true of the energy levels of electrons in shells?
a. Electrons must lose energy to move from the first to the second shell.
b. The valence shell has higher energy than other occupied shells.
c. All the electrons in an atom have similar amounts of energy.
d. All of the above are correct.
e. None of the above is correct.
5.
Two atoms always represent the same element if they have
a. the same mass number.
b. the same number of electrons.
c. the same number of shells.
d. the same number of protons
e. the same number of particles in the nucleus.
Hthsci 1110 Lab Assignment Module 2
Page 3
6.
An atom has 8 protons, 8 neutrons, and 8 electrons. Another isotope of the same
element might have
a. 9 protons.
b. 10 neutrons.
c. 7 electrons.
d. mass number 16, atomic number 7.
e. All of the above are correct.
7.
Radioactive decay is likely to occur when
a. an atom has too many neutrons.
b. atoms collide with one another.
c. protons break into neutrons and electrons.
d. an atom has too many electrons.
e. an electron hits the nucleus.
8.
A cation with two units of charge has 10 neutrons and 8 protons. The ion also has
a. 10 electrons.
b. 8 electrons.
c. 6 electrons.
d. 12 electrons.
e. 16 electrons.
9.
A phrase that applies to covalent bonding and not other kinds of bonds is
a. electron-sharing.
b. great strength.
c. paired electrons.
d. charge attraction.
e. All of the above are correct.
10.
In molecules C, H, O and N atoms usually make _____, _____, _____ and _____
bonds respectively.
a. 4, 1, 2, 3
b. 4, 1, 3, 2
c. 3, 2, 1, 4
d. 3, 2, 4, 2
e. 2, 1, 3, 4
Hthsci 1110 Lab Assignment Module 2
Page 4
11.
In a double covalent bond, a carbon atom shares
a. electrons in two of its shells.
b. two electrons.
c. electrons in two orbitals.
d. both valence and nonvalence electrons.
e. None of the above are correct.
12.
Partial charges occur when
a. a covalent bond links atoms of two kinds.
b. atoms share electrons unequally.
c. two ions are close together.
d. any of the above occur.
e. Both a and b are correct.
Water Quiz Questions
1.
The water molecule has a bent shape because
a. covalent bonds are never straight.
b. hydrogen atoms have a partial negative charge.
c. hydrogen atoms attract one another.
d. oxygen has two unbonded pairs of valence electrons.
e. None of the above, water molecules are linear.
2.
Which statement is true of water?
a. The O atom in water has a partial positive charge.
b. The H atoms in water have partial positive charges.
c. Its polarity results from hydrogen’s high electron negativity,
d. About 50% of the average cell’s mass consists of water.
e. All of the above except for A are correct.
3.
Dr. Haxton told his class that a water molecule can make 4 hydrogen bonds, all of
them in the same plane as the three atoms. What would a good student reply?
a. Wrong! Each atom makes one hydrogen bond, for a total of 3.
b. Right! Hydrogen bonds form at both ends of each covalent bond.
c. Wrong! Two hydrogen bonds are not in the plane of the atoms.
d. None of the above is correct.
e. Both a and b are correct.
Hthsci 1110 Lab Assignment Module 2
Page 5
4.
Despite its cohesion, water can flow because
a. many water molecules have no hydrogen bonds.
b. hydrogen bonds break and re-form rapidly.
c. hydrogen bonds are too weak to affect movements
d. hydrogen ions can move between molecules.
e. None of the above is correct.
5.
Which statement must be mentioned in explaining why amphipatic molecules line up
at a water surface?
a. Polar groups attract one another.
b. Nonpolar groups attract one another.
c. Nonpolar groups repel water.
d. Polar groups repel water.
e. All of the above are correct.
6.
Dissolving is best described as
a. a mingling of molecules and/or ions.
b. molecules breaking into ions.
c. a separation of molecules into neutral atoms
d. breaking covalent bonds.
e. a change from a solid to a liquid.
7.
Water is a source of ________________ for chemical reactions in cells.
a. hydrogen atoms
b. oxygen atoms
c. energy
d. Both a and b are correct.
e. a, b, and c are correct.
8.
Water has a surface tension because
a. molecules at the surface make more hydrogen bonds.
b. there is positive pressure inside the water mass.
c. hydrogen bonds between surface water molecules resist being
stretched.
d. water tends to evaporate from the surface.
e. cohesion forces are weaker at the surface.
Hthsci 1110 Lab Assignment Module 2
Page 6
9.
The open spaces in water’s crystal structure make it possible for
a. aquatic life to exist at the North Pole.
b. water to have a low boiling point.
c. life to occur in hot springs.
d. Both b and c are correct.
e. a, b, and c are correct.
10.
A solution contains only glycerol and fructose. There is ten times as much glycerol
as fructose. Therefore,
a. glycerol is a solute.
b. both glycerol and fructose are solutes.
c. fructose is the solvent.
d. glycerol is the solvent.
e. None of the above is correct.
11.
A solution is aqueous if
a. it contains water.
b. it occurs in nature.
c. water is the solvent.
d. water is a solute.
e. None of the above are correct.
THERE ARE NO GRAPHICS FROM THE TEXT FOR MODULE 2 EXAM.
Hthsci 1110 Lab Assignment Module 2
Page 7
ANSWERS:
1.
A(n) ATOM
element.
2.
A proton has a
3.
An electron has a NEGATIVE charge.
4.
A neutron has a NEUTRAL charge.
5.
The Periodic Table is arranged in order of what?
6.
The vertical columns in the periodic table are called
7.
The horizontal rows in the periodic table are called
8.
The atomic number is
9.
The mass number is
is the smallest particle that retains the properties of that
POSITIVE
charge.
INCREASING ATOMIC NUMBER
GROUPS
.
PERIODS
.
THE NUMBER OF PROTPONS IN AN ATOM
.
THE NUMBER OF PROTONS AND NEUTRONS IN AN ATOM.
10. The Total Atomic Mass is made up of what? THE MASS OF THE NUCLEUS
(PROTONS AND NEUTRONS) AND THE ELECTRONS
11.
99.9% of the mass of each atom is in the
12.
What is found in the nucleus of an atom?
13.
Oxygen has a mass number of
14.
Atoms of one element always have the same number of
PROTRONS
.
but can have different numbers of
NEUTRONS
or
ELECTRONS .
15.
Atoms that have the same number of protons, different numbers of neutrons,
and different mass numbers are called
ISOTOPES
.
16
NUCLEUS
.
THE PROTONS AND NEUTRONS
and an atomic number of
8
.
Hthsci 1110 Lab Assignment Module 2
Page 8
Chemistry of Life
Atom Structure, Ions, Molecules
1. d
2. a
3. e
4. b
5. d
6. b
7. a
8. c
9. a
10. a
11. c
4. a
5. a
6. a
7. d
8. c
9. a
10. d
11. c
12. e
Water Quiz Questions
1. d
2. b
3. c
Hthsci 1110 Lab Assignment Module 2
Page 9