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WorksheetsMatter
Total questions: 15
Worksheet time: 17mins
Name
Class
Date
1.
Which of these options represents a compound?
a)
P4
b)
O2
c)
H2O
2.
When chemical W is added to a liquid, the chemical breaks down into substances X, Y, and Z. It is not possible to break down substances X, Y, and Z into simpler substances. What conclusion is supported by this evidence?
a)
Chemical W is an element.
b)
Chemical W is a pure substance.
c)
Substances X, Y, and Z are elements.
d)
Substances X, Y, and Z are compounds.
3.
Study the flow chart showing the organization of matter. What term is missing as indicated by the question mark in the flow chart?
a)
Compounds
b)
Metals
c)
Molecules
d)
solutions
4.
How are the elements organized into the periodic table?
a)
Elements are ordered by atomic weight.
b)
Elements are ordered by atomic number
c)
Elements are arranged alphabetically.
d)
Elements are grouped by color.
5.
What is the significance of a column in the periodic table?
a)
A column, better known as a group, includes elements with similar properties.
b)
A column, better known as a period, includes elements with similar properties.
c)
A column, better known as a group, includes elements with the same number of electrons.
d)
A column, better known as a period, includes elements with the same number of electrons.
6.
This is a diagram of an oxygen atom.
a)
0
b)
8
c)
16
d)
24
7.
halogensWhat is identified in the illustration?
a)
halogens
b)
metalloids
c)
noble gases
d)
transition metals
8.
Which statement about the elements is true?
a)
Oxygen and sulfur share similar properties.
b)
Carbon and nitrogen share similar properties.
c)
Carbon and silicon have the same number of electrons.
d)
Oxygen and phosphorus have the same number of protons.
9.
Which term represents a physical property of matter?
a)
density
b)
flammability
c)
reactivity
d)
toxicity
10.
Which example shows a physical change taking place?
a)
Heat is given off.
b)
The substance melts.
c)
A new substance is produced.
d)
A precipitate is formed.
11.
Jake made a chart showing changes that occurred while he prepared his breakfast.
Which numbers would best represent chemical changes?
Which numbers would best represent chemical changes?
a)
2, 3, and 6
b)
2 and 6
c)
1, 2, and 3
d)
2 and 3
12.
Which statement about the Law of the Conservation of Mass is true?
a)
The mass of the products can be less than the mass of the reactants.
b)
The mass of the products must be equal to the mass of the reactants.
c)
The mass of the final products can be more than the mass of the reactants.
d)
The mass of the reactants must be more than the mass of the products
13.
A sample of 5 g of chemical A is combined in a chemical reaction with 12 g of chemical B. The mass of their products is 17 g. Which law of nature best supports this statement?
a)
law of conservation of energy
b)
law of conservation of mass
c)
law of averages
d)
law of regularity
14.
Review the reactants in the chemical reaction shown.
How many atoms of oxygen must be present in the product of this reaction?
How many atoms of oxygen must be present in the product of this reaction?
a)
1
b)
2
c)
4
d)
6
15.
A student does an experiment with baking soda and white vinegar. She measures the masses of the baking soda and vinegar samples using a balance scale and combines the substances in an OPEN test tube. She then calculates the mass of the resulting liquid and finds that it has decreased. What most likely explains the difference in mass before and after the reaction?
a)
A gas was produced in the reaction that escaped.
b)
A solid was produced in the reaction that precipitated.
c)
The balance used to weigh the substances was not accurate.
d)
The temperature of the reactants was lower than the products.
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