What is a prediction about
a problem that can be
tested?
Hypothesis
What is a term for drawing
a conclusion based on
something you observe?
Infer
What is the factor being
measured in an
experiment?
The Variable
What is the first step in the
scientific method when
designing an experiment?
Recognize the problem
What is the last step in the
Scientific Method?
Draw a conclusion
What must scientists base
their conclusions on to
avoid being impartial
Evidence
What should be worn at all
times in the lab to
decrease the likelihood of
an eye injury?
Safety Goggles
What type of footwear is
required in a lab?
Hard-soled covered
shoes
Which is the correct way to
hold a test tube while
heating its contents?
Pointing away from
yourself and others
Why should taste never be
used to test the identity of
an unknown chemical?
Many chemicals are
poisonous
A beaker contains 2 L of
water. What is the Volume
of water in milliliters?
2L x 1,000ml = 2,000 ml
1L
At what temperature on the
Celsius scale does water
boil?
o
100
C
What is the
volume of liquid
in this
graduated
cylinder?
35 ml
How many centimeters are
in a meter?
100
How many meters are in a
kilometer?
1,000
How many millimeters are
in a meter
1,000
What are you measuring
when you measure
something in meters
cubed?
Volume
What is the amount of
space taken up by an
object?
volume
What is the standard unit
for length in the metric
system
Meters
What is the standard unit
for mass in the metric
system?
Kilogram
What is the unit for volume
in the metric system?
Liter or
3
cm
What property of an object
is measured in grams?
Mass
Which unit of length is the
best to measure the length
of your pencil
Centimeter
How are electrons in an
atom organized?
In energy levels
What are the subatomic
particles that make up an
atom?
Protons, Neutrons, and
Electrons
Where are electrons
located in an atom?
Electron cloud
Which subatomic particles
are found in the nucleus of
an atom?
Protons & Neutrons
Which subatomic particle
in an atom have a
negative (-) charge?
Electrons
Which subatomic particle
in an atom have a
Positive (+) charge?
Protons
Which subatomic particle
in an atom have no
charge?
Neutrons
Which two subatomic
particles have the greatest
mass in an atom?
Protons & Neutrons
Who proposed that all atoms
are small, hard particles made
of a singe material formed into
different shapes and sizes?
Dalton
Who was the Greek
philosopher responsible
for naming the atom?
Democritus
Using the periodic table,
how is the number of
electrons in an atom
determined?
Atomic Number/Number of
protons
What are atoms of the
same element with
different atomic masses
called?
Isotopes
An atom’s identity is
determined by which
subatomic particle?
Proton
How many elements are in
the first period of the
periodic table?
2
In what period is Calcium
(Ca) located?
4
How many electrons can
the second energy level
closest to the nucleus
hold?
8
On the periodic table, what
is a column of elements
called?
Group or Family
On the periodic table what
is a row of elements
called?
Period
What is the name of group
18 on the periodic table?
Noble gases
Which of the following
elements are halogens:
Boron
Oxygen
Fluorine Lithium
Chlorine
Argon
Fluorine and Chlorine
What is the
atomic number
of the atom in
the diagram?
3
What is a precaution that
should be used for people
who have long hair in the
lab?
Must be tied back and
away from flames
Describe the procedure for
smelling a chemical
Point the vessel away from
the face and fan the vapors
toward the nose.
What should you do if your
hands feel slippery while
using a base in an
experiment?
Rinse your hands with
large amounts of water
to dilute the base
Why is eating and drinking
not permitted in the lab?
You could be poisoned
What should you do if you
become very thirsty while
working in a science lab?
Do not drink until you
leave the lab
By what multiples are all SI
units related?
10
At what temperature on the
Celsius scale does water
freeze?
o
0 C
Which of the following
units are metric units?
A. Kilometer B. Gram
C. Inch
D. Mile
E. Pound
Kilometer and Gram
Which scientist performed
experiments with different
substances that demonstrated
that elements combine in
specific proportions because
they are made of an individual
atom?
Dalton
An element that is a very
reactive gas is most likely
a member of which
group/family?
The halogens
Which of elements do not
normally form chemical
bonds?
Noble gases
Based on the number of
valence electrons, which of
the following elements is the
most reactive:
Li Be B Ne
Li
How many electrons does a
nitrogen (N) atom contain?
How many valence electrons
does it contain?
7, 5
How many protons does a
Argon (Ar) atom contain?
18
How many neutrons does
the most commonly
occurring form of
potassium (K) contain?
20
Two isotopes of carbon are
Carbon-12 and Carbon-14.
How do these isotopes
differ?
By two neutrons
On the periodic table, what
is the atomic mass of
Mercury (Hg)?
200.6 amu
What are groups 3-12 on
the periodic table called?
Transition Metals
What is the name of group
13 on the periodic table?
Boron Group
What is the name of group
16 on the periodic table?
The Oxygen Group
What is the smallest particle of
an element called that has the
chemical properties of that
element?
An Atom
What type of charge do
atoms have?
Neutral
What subatomic particle
does the atomic number of
an atom represent?
Protons
What two subatomic
particles are used to
determine atomic
mass/mass number
Protons and Neutrons
What must the number of
electrons equal in an
atom?
The number of protons
What items are contained
in the nucleus of an atom?
Protons and Neutrons
What is the smallest
particle of an atom?
Electron
How many electrons can
the first energy level of an
atom hold?
2
What type of charge does a
proton have?
Positive
What type of charge does a
neutron have?
Neutral
Describe the amount of
electrons in the outer
energy level of a noble gas.
8/ A complete set
Why do elements in a
family or group in the
periodic table often share
similar properties?
Their atoms have the same
number of valence
electrons
What element is a gas at
room temperature and has
six valence electrons?
Oxygen
Which group on the
periodic table has a
completes set of electrons
in its outer energy level?
Noble Gases
How many valence
electrons do atoms of
elements in the same
group as oxygen have?
6
Why is helium considered
a noble gas?
It has a full valence shell
How many valence
electrons does Nitrogen
have?
5
Oxygen is in group 16.
How many valence
electrons does it have?
6
How many valence
electrons does Sodium
(Na) have?
1
Carbon is in group 14.
How many valence
electrons does it have?
4
Potassium is in group 1.
How many valence
electrons
1
Chlorine is in group 17.
How many valence
electrons does it have?
7
Where are valence located
within an atom.
In the outermost energy
level
Given the classes metals,
metalloids, gases, and
nonmetals, what class
contains the most elements on
the periodic table?
Metals
Where are metalloids
located on a periodic
table?
Between the metals and
nonmetals, on either side of
the zig-zag line.
Which class of elements
has no luster, and is a poor
conductor?
Nonmetal
Which elements are strong
conductors of electricity?
Metals
What elements have some
properties of metals and
nonmetals?
Metalloids
What are elements in
group 18 called?
Noble gases
Where are the most active
metals located on the
periodic table?
Lower left
What groups are the
transition metals?
3-12
What nonmetal can exist
as diamond, graphite, and
charcoal?
Carbon
What nonmetal is located
in group 1?
Hydrogen
What type of element tends
to lose electrons when it
forms bonds?
Metals
Which pair of atoms can form
an ionic bond?
1. Hydrogen and Oxygen
2. Potassium and Fluorine
Potassium and Fluorine
What subatomic particle is
the most important in
determining how an atom
will bond?
Valence electrons
Which type of element is
most likely to gain
electrons when it forms
bonds?
Nonmetals
What type of bond occurs
between oppositely charged
ions?
Ionic Bond
What type of bond occurs
when the force of attraction is
between the nuclei of atoms
and the electrons shared by
the atoms?
Covalent bond
What is the term used to
describe the joining of
atoms to form new
substances
Chemical bonding
What type of bond holds
together a neutral group of
atoms?
Covalent
What is the charge of a
potassium ion that has 19
protons and 18 electrons
+
1
What is the correct formula
for sodium chloride?
NaCl
What is the correct formula
for Calcium Fluoride?
CaF2
What is the charge of an
ion that contains 16
protons and 18 electrons
2
What do atoms gain, lose,
or share when they bond?
Valence electrons
Why don’t noble gases
normally form chemical
bonds?
They have a full
outermost energy level
What is the charge of an
aluminum ion that has 13
protons and 10 electrons?
+
3
What is a molecule that is
made up of two atoms of the
same element called?
Example: O2 and H2
A diatomic element