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WorksheetsChemistry Benchmark Review
Total questions: 32
Worksheet time: 16mins
Where should the electrons be placed in the model?
on the lines of the orbitals
inside the nucleus
in the space between the orbitals
in between the space between the nucleus and the first orbital
How are the elements organized into the periodic table?
Elements are ordered by atomic weight.
Elements are ordered by atomic number.
Elements are ordered alphabetically.
Elements are grouped by color.
What type of bond is frequently formed from reactions between metals and nonmetals?
covalent bonds
hydrogen bonds
ionic bonds
metallic bonds
What does the subscript indicate in this chemical formula: CaCl2?
number of electrons in Cl
number of atoms of Cl
number of molecules of CaCl
number of atoms of CaCl
Where are metals found on the periodic table?
Metals are found on the left and right sides of the staircase on the periodic table.
Metals are found on the right side of the staircase on the periodic table.
Metals are found on the left side of the staircase on the periodic table.
Metals are found only touching the staircase on the periodic table.
Which arrangement represents an element?
P only
R only
P and Q
R and S
Why is this arrangement considered a mixture?
It is composed of one kind of atom.
It is composed of extremely small particles.
It is a physical combination of two or more different substances.
It is composed of two or more types of elements that are chemically combined.
Which gas is made from more than one element?
carbon dioxide
helium
oxygen gas
nitrogen gas
The chemical formula for ammonia is NH3. What makes up this compound?
1 sodium and 3 helium atoms
3 sodium and 3 hydrogen atoms
3 nitrogen and 3 helium atoms
1 nitrogen and 3 hydrogen atoms
Which substance is an element in the reaction?
oxygen
sugar
sunlight
water
The chemical formula for glucose is C6H12O6. How many types of ELEMENTS are found in glucose?
3
4
24
25
Which statement describes a chemical property?
Steel is shaped into automobile fenders.
Water begins to boil when it reaches 100oC.
Oil floats on water because it is less dense.
Iron slowly forms rust when exposed to oxygen gas.
Based on the properties listed, which material(s) is/are metal(s)?
P
R
P and Q
P and R
Which metal is in a liquid state at 1,000C?
copper
iron
silver
zinc
Which term represents a physical property of matter?
density
flammabiity
reactivity
toxicity
Which statement bests describes a physical property?
A physical property can be measured without changing the chemical makeup of the material.
A physical property describes the product of a reaction between two substances.
A physical property describes the substance in terms of energy content.
A physical property of a substance varies from sample to sample.
Which substances are considered slightly alkaline (basic)?
lemon juice and vinegar
ammonia and milk of magnesia
baking soda and seawater
coffee and rainwater
Which statement is true about acids?
They feel slippery.
They taste sour.
They turn red litmus paper blue.
They turn phenolphthalein bright pink.
A drop of phenolphthalein turned an unknown substance bright pink. What can be inferred about the substance?
It is neutral.
It tastes sour.
It has a pH range of 1-6
It has a pH range of 8-14
Which solution could be considered an acid?
Solution W
Solution X
Solution Y
Solution Z
Which pair of listed properties correctly describes most acids?
They contain Hydrogen ions (H+) and have a bitter taste.
They contain hydrogen ions (H+) and have a sour taste.
They contain hydroxide ions (OH-) and have a bitter taste.
They contain hydroxide ions (OH-) and have a sour taste.
Which example represents an entirely physical change?
Black iron turns to reddish-brown when it rusts.
Water boils which creates bubbles and water vapor.
Wood burns to produce ashes and gases.
Carbon dioxide combines with limewater to produce chalk.
Which change from the list represents a chemical change and why?
1 because the egg and the eggshell changed shape.
2 because the cooked egg had new properties.
3 because the butter melted on the warm toast.
4 because the juice changed shape.
What type of change is being described and why?
a physical change as bubbles were formed
a physical change as the temperature decreased
a chemical change as the shape of the cube changed
a chemical change as the temperature changed and a gas was released
Which observation of a burning candle represents a chemical change?
The candle wax melts.
The size of the candle reduces.
The candle wick burns with a flickering flame.
The hot wax flows down the candle and later hardens.
Based on the Law of Conservation of Matter, which amount represents the mass of the smoke released?
0 g
7 g
38 g
45 g
What does the experiment illustrate?
During a chemical reaction, matter is neither created nor destroyed.
The mass of the reactants is greater than the mass of the products.
Changes in state always involve changes in the mass of the substances.
The mass of the products is greater than the mass of the reactants.
How is the Law of Conservation of Mass best represented in a chemical reaction?
The mass of the products is greater than the mass of the reactants.
The mass of the reactants is greater than the mass of the products.
The mass of the reactants is equivalent to the mass of the products.
The mass of the reactants has no relationship to the mass of the products.
Which chemical equation supports the Law of Conservation of Matter?
2H + O2 → 2H2O
H2 + O2 → H2O
H2 + O2 → 2H2O
2H2 + O2 → 2H2O
How many total atoms are found on each side of the arrow?
4
5
6
8
A rock has a mass of 5.00 g and a volume of 25.00 cm3. What is the density of the rock? (Density = Mass/Volume)
0.20 g/cm3
0.50 g/cm3
2.00 g/cm3
5.00 g/cm3
Which cube has the lowest density? (Density = Mass/Volume)
Cube 1
Cube 2
Cube 3
Cube 4
