WorksheetsChem Test Home Practice
Total questions: 12
Worksheet time: 6mins
Which of the following is an example of a compound?
boron
carbon dioxide
salad
steel
What does the subscript number 2 in H2SO4 mean?
Two molecules of this compound
Two atoms of hydrogen for each atom of sulfur
Two atoms of oxygen for each atom of sulfur
All of the above
Which of these is a physical change?
Modeling clay being shaped into a sculpture
A forest fire
Calcium chloride and water making heat when mixed together
Acids turning an indicator pink
Where is the heaviest element found in the Periodic Table?
Top left
Top right
Bottom left
Bottom right
How many protons and electrons in the average atom of Xenon?
54 protons, 77 electrons
54 protons, 54 electrons
26 protons, 26 electrons
26 neutrons, 22 protons
Which group of nonmetals is used to stop chemical reactions because of how nonreactive they are?
Noble gases
Halogens
Alkali metals
Transition metals
Which sign of a chemical reaction comes from the word for "fall"?
Color change
Temperature change
Gas formation
Precipitate formation
Which of the following is a heterogeneous mixture? Choose all that apply.
Water
Fruit salad
Lemonade
Milk
If a 26-gram block of cheese melts, how much will the melted cheese weigh?
26 grams
Less than 26 grams
More than 26 grams
0 grams
Which of the following is the clearest sign of a chemical reaction?
Gas formation
Color change
Size change
Production of a new substance
In a sealed container, 10 grams of one substance reacts with some amount of a second substance, and the results weigh 16 grams. How much of the second substance was there?
6 grams
160 grams
16 grams
176 grams
Which element below would have the most similar properties to chlorine (Cl)?
fluorine (F)
argon (Ar)
sodium (Na)
sulfur (S)
