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WorksheetsChemistry Unit Test Review
Total questions: 50
Worksheet time: 42mins
Which of the following provide evidence to support a chemical change?
Gas Production
Color Change
Temperature Change
All are evidence
Which one of the following substances can be separated physically, but not chemically?
Elements
Compounds
Mixtures
Which of the following is the simplest form that a substance can take?
Element
Compounds
Mixtures
An element..
Contains one type of atom
Contains two types of atoms
Is always made up of molecules
Which of the following is true about electrons?
They are found inside that nucleus of an atom and have no charge
They are the heaviest subatomic particle
They are negatively charged found orbiting outside of the nucleus
They are positively charged and found inside the nucleus
Which of the following would be considered a homogeneous mixture?
Salad
Salt water
Pizza
Italian Dressing
The compound sucrose has a chemical formula of C12H22O11. How many elements are in one molecule of sucrose?
3
12
11
22
Which of the following is a compound?
N
Na
CO2
O
Is this an image of an element, a compound, or a mixture?
Element
Compound
Mixture
Is this an image of an element, a compound, or a mixture?
Element
Compound
Mixture
What is the charge of a proton?
Negative
Neutral
Positive
No charge
A family or a group on the periodic table is
Horizontal
Vertical
Left side
Right side
Metals make up the majority of the periodic table and are on which side of the periodic table?
right
left
along staircase
period 2
H2O2 is considered a
Element
period
compound
Mixture
What particles are found in the nucleus of an atom?
proton, neutron
neutron. electron
electron, proton
electron, neutron
The elements on the picture all belong to the same
period
family
group of gases
group of metals
Which of the following is NOT an element
Potassium (K)
Water (H20)
Gold (Au)
Carbon (C)
The atomic number indicates the number of _____________ in an atom?
neutrons
electrons
subatomic particles
Protons
What is not an indication that a chemical change has taken place?
change in color
change in temperature
change in shape
formation of a precipitate
Mixtures can be
physically separated
not physically separated
pure substances
separated by a chemical reaction
Which of the following can be considered an chemical property?
Rust, burning
melting point
boiling point
density
What is an sign that a chemical change in this reaction.
bubbles form
two compounds mix in a bag
a homogeneous mixture forms
water dissolves powder
Neutrons have a
Negative charge
No charge
Positive charge
valance charge
Na2CO3
Identify the solvent
What element is represented in this Bohr Model?
Carbon
Hydrogen
Aluminum
Lithium
The________are colorless and generally unreactive, mostly due to their full outer electron shells.
Metalloids
Nonmetals
Halogens
Noble Gases
On the periodic table, Periods are
Horizontal rows
Vertical columns
On the periodic table, Groups are
Horizontal rows
Vertical columns
