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Total questions: 78
Worksheet time: 39mins
The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided?
Electron
Molecule
Element
Atom
What is the most important safety rule?
Never do experiments that involve flames or hot objects.
Never work with chemicals.
Always follow your teacher's instructions and lab directions exactly.
Always used unbreakable glassware
Which of the following is a chemical change?
Water breaking down in hydrogen and oxygen
ice being carved
ice melting
water boiling
Which lists of elements contains only metals?
Helium, iron, copper
Tin, copper, gold
Carbon, iodine, tin
Iodine, carbon, argon
Rutherford's gold foil experiment provided evidence for which of the following statements?
Alpha particles have a positive charge.
There is a dense, positively charged mass in the center of an atom.
Gold is not as dense as previously thought.
Negative and positive charges spread evenly throughout an atom.
Which of the following is malleable?
Pottery
Ice
Gold
Glass
The smallest unit of an element that maintains the properties of that element is a(n)
Atom
Compound
Substance
Molecule
Atoms of the most reactive elements tend to have
No valance electrons
Eight valance electrons
One or seven valance electrons
Four or five valance electrons
Which of these elements would most likely be shiny, gray-colored, solid at room temperature, conduct electricity, and dent when hit with a hammer?
Argon
Aluminum
Sulfur
Chlorine
Which of the following is NOT a pure substance?
Milk
Water
Carbon dioxide
Oxygen
A scientist's paper is rejected by a journal because the paper did not reveal key details about the experiment she performed to get her results. WHat ethical argument could the editor give for this rejections?
The scientist had repeated her experiment several times with identical results.
The scientist's finding were similar to results reported for other species.
Sample collection had been done by a graduate student.
Other scientists would not be able to verify her findings without more information.
An orderly, systematic approach to solving a problem is called the
Experiment
Conclusion
Investigation
Scientific method
Evaporation refers to the change from a
Liquid to a gas
Gas to a liquid
Liquid to a solid
Solid to a liquid
The resistance of a liquid to flow is its
Viscosity
Pressure
Temperature
Volume
Which element on the periodic table has a chemical symbol of Hg?
Helium
Hydrogen
Silver
Mercury
Each column of the periodic table is
A period
A group
An element
An isotope
A subatomic particle that has a negative charge is called a (n)
Compound
Element
Molecule
Electron
A gas has
A definite volume but no definite shape
A definite shape but no definite volume
No definite shape or volume
A definite volume and shape
Which of the following is an element?
Sand
Iron
Nylon
Salt
How many elements are on the current periodic table of elements?
118
200
100
150
Suppose scientists discovered a new element while studying rock and soil samples brought back from a Mars mission. How many valence electrons would be expected for this element that should be placed in column 7A (17) on the periodic table?
1
2
4
7
Two different isotopes of an element have different
Number of electrons
Number of protons
Atomic numbers
Numbers of Neutrons
Forces of attraction limit the motion of particles most in
A solid
A gas
A liquid
Both liquids and gases
Particles in a liquid
Are free to move within a container but remain in close contact with one another.
Decrease in volume with increasing temperature
Are packed together and stay in a fixed position
Have no viscosity
The usefulness of Mendeleev's periodic table was confirmed by
Its immediate acceptance by other scientists
The discovery of elements with predicted properties
The discovery of subatomic particles
The discovery of the nucleus
Which term describes changing into a liquid?
Vaporizing
Melting
Condensing
Freezing
Which of the following have the same number of valence electrons?
The elements having similar atomic masses
The elements having similar atomic numbers
The elements in a group
The elements in a period
The tendency of an element to react is closely related to
The number of valence electrons in atoms of the element.
Attractions between its atoms.
Its atomic mass.
The ratio of protons to Neutrons in atoms of the element.
What is an atom's nucleus made of?
Protons and neutrons
Only protons
Anodes
Only neutrons
In which state of matter are particles packed tightly together in fixed positions?
Gas
Compound
Solid
Liquid
Which of the following is an example of a safe laboratory procedure?
Touching hot objects with your bare hands
Eating and drinking from laboratory glassware
Testing an odor by directly inhaling the vapor
Tying back long hair and loose clothing
The phase change in which a substance changes from a solid to a gas or vapor without changing to a liquid first is
Deposition
Vaporization
Melting
Sublimation
The number of energy levels filled in an atom is determined by
Protons
Neutrons
Photons
Electrons
Ninety-nine percent of all matter that can be observed in the universe exists as
Plasmas.
Solids.
Gases.
Liquids
Ice floats in water because it is
Colder than water
More dense than water
Less dense than water
Warmer than water
Which unit is used to measure the height of a bookcase?
Kelvin
Mole
Kilogram
Meter
I don't feel as if I quite fit in to an category. I am often shown on top of Group 1, but with a gap so that I am not connected to the others. Sometimes I am shown floating in the middle of the Periodic Table, not joining any of the other elements. Then again, I can be shown lurking at the top of Group 17, but still not linked up. You would think that the most abundant element in the universe would be welcome to join any group, but not so! Who am I, the only element with no clear family?
Uranium
Helium
Boron
Hydrogen
Which unit is used to measure the mass of a computer?
Kilogram
Kelvin
Mole
Meter
The phase change in which a substance changes from a gas directly to a solid is
Deposition
Condensation
Sublimation
Vaporization
Which of the following is Not true of noble gases?
They are nonmetals
They belong to Group 18
They are highly reactive
They exist as single atoms
Your teacher hands out a copy of a laboratory experiment. What is the first thing you should do to conduct the experiment safely?
Mix your materials with thouse of another group to save time
Read every step f the procedure o make sure you undrstand it.
Obtain and open an chemicals described inthe experiment
Begin heating any materials that will need to be hot
Which of the following causes a chemical change?
Burning
Shattering
Moving
Melting
The science of what matter is made of how it changes is called
Physics
Engineering
Chemistry
Kinetics
How many protons does cesium have?
55
132.90
133
78
In which of the substances in the figure shown are the forces of attraction among the particles so weak that they can be ignored under ordinary conditions?
Substance B
Substance C
Substance A
All of the Substances
An oatmeal raisin cookie is an example of a
Heterogeneous mixture
Homogeneous mixture
Solvent
Solution
In which step of the scientific method is information obtained through the senses?
Making observation
Revising a hypothesis
Analyzing data
Drawing conclusion
How many neutrons does cesium have?
55
78
133
132.90
The phase change that is the reverse of condensation is
Sublimation
Melting
Vaporization
Freezing
Atoms of element that are in the same group have the same number of
neutrons
valence electrons
protons
protons & neutrons
Atoms have no electric charge because they
Have an equal number of charged and no charged particles
have an equal number of electrons and protons
have Neutrons in their nuclei
have an equal number of neutrons and protons
When water is broken down by electrolysis, the products are
water and carbon dioxide
hydrogen and carbon dioxide
hydrogen gas and oxygen gas
oxygen and methane
The chemical formula for water, H2O means that each water molecule contains
Two hydrogen atoms and two oxygen atoms
one hydrogen atom and two oxygen atoms
two hydrogen atoms and zero oxygen atoms
two hydrogen atoms and one oxygen atom
Scientists test a hypothesis by
Drawing conclusions
formulation questions
doing experiments
designing models
During which phase does the arrangement of water molecules become more orderly?
Melting
Boiling
Condensing
Freezing
Which of the following is NOT a clue that a chemical change has occurred?
Change in shape
Production of a gas
Formation of a precipitate
Change in color
Matter that has a definite volume but no definite shape is a
liquid
gas
plasma
solid
The temperature at which a substance changes from a liquid to a solid is the
Boiling point
freezing point
saturation point
condensation point
Which general statement does Not apply to metals?
Most metals are brittle
Most metals are ductile
Most metals are good conductors of electric current
Most metals are malleable
What is the chemical symbol for fluorine?
F
Al
Fl
Fr
Which of the following is a physical change?
Sawing a piece of wood in half
Burning a piece of wood
A copper roof changing color from red to green
Rust forming on an iron fence
What type of change occurs when water changes from a solid to a liquid?
A reversible change
A physical change
A phase change
All of the above
Mendeleev left gaps in his periodic table because
No known elements fit there
Protons belonged there
The table was too small
The table was too full
Mendeleev arranged the known chemical elements in the table according to increasing
atomic number
number of protons
number of electrons
mass
Which of the following is an example of a gas-liquid mixture?
A helium balloon
A carbonated drink
The air we breathe
Ice cubes
Which statement is true about the metalloid silicon?
Silicon is a better conductor of electric current than carbon is
Silicon does not conduct electric current under any conditions
silicon's ability to conduct electric current does not vary with temperature
Silicon is a better conductor of electric current that silver is
If an unknown substance CANNOT be broken down into simpler substances, it is
a mixture
a compound
made of one kind of atom
an element and made of one kind of atom
The charge of an atom is
postive
unbalanced
negative
neutral
After formulating a question, the next step in the scientific method is
to research and collect data
to state a conclusion
to perform an experiment
to test a hypothesis
What is Mendeleev know for?
creating today's atomic model
discovering Mendelevium
discovering protons
publishing the first period table
Flammability is a material's ability to burn in the presence of
hydrogen
nitrogen
carbon dioxide
oxygen
Democritus thought that matter was made of tiny particles
that could not be divided
of earth, air, fire, and water
that could be divided
that were all round and smooth
At room temperature, more than half of the nonmetal elements are
solids
gases
liquids
alloys
An atom's mass number equals the number of
neutrons
protons plus the number of electrons
protons plus the number of neutrons
protons
The first step on the scientific method is usually
collecting data
making an observation
testing a hypothesis
forming a hypothesis
Which of the following is unique for any given element?
the charge of the electrons
The number of protons
the mass of a neutron
the number of neutrons
The phase change in which a substance changes from a liquid to a gas is
vaporization
deposition
sublimation
condensation
Water is compound because it
is a liquid at room temperature
is made of water atoms joined together
can be broken down into simpler substances
always has two hydrogen atoms for each oxygen atom
