WorksheetsUnit 6: Elements & Compounds
Total questions: 20
Worksheet time: 11mins
Which of the following is not a compound?
O
CHO
NaCl
CHLi
Which of the following is a compound from the chemical reaction listed above?
Oxygen
Hydrogen
Water
Carbon
Which substance represented in this equation is classified as an element?
CO
H2O
CO2
H2
What is an example of a physical property?
Color change
Bubbling
Boiling point
Formation of a gas
Which of the following diagrams illustrates a compound?
None of the above
Which of the following best describes the difference between elements & compounds?
Elements and compounds are so similar in chemical nature that they are virtually the same thing.
Elements and pure substances composed of one kind of particles whereas compounds are substances that contain two or more elements that have chemically combined.
Elements can be found naturally whereas compounds have to be created by scientist.
Elements are substances that contain two or more particles that have chemically combined whereas compounds are pure substances composed of one kind of particle.
Which of the following list contains an element followed by a compound that contains that element?
NH3 He
H H2O
CO2 C
NaCl Co
Ms. Holmes had a beaker with a small amount of baking soda. She added a few drops of vinegar to the baking soda and observed fizzing and bubbling. Based on her observation, which of these can Ms. Holmes determine about the new substance formed by mixing baking soda and vinegar?
A chemical reaction produced a solid.
A chemical reaction produced a gas.
No chemical reaction occurred.
Only a physical change happened.
Which list contains chemical changes only?
A chemical change is?
Reversible.
Permanent.
A phase change.
A temperature change.
The best Friends club uses "invisible ink" to write notes to each other. The invisible ink is actually lemon juice that is clear when it dries on paper but turns brown when a club member holds a burning candle under the paper. Once it is heated, it is never invisible again. What type of change is occurring when the paper is heated?
Chemical Change.
Elemental Change.
Physical Change.
Temperature Change.
Which of the following is a chemical property associated with wood?
Ability to burn.
Snapping when bent.
Floating on water.
Having a rough surface.
Which of the following is a chemical property of iron?
Melting when heated.
Sticking to a magnet.
Rusting over time.
Conducting electricity.
A chemical reaction...
happens when water turns to ice.
happens when ice turns to water.
can be reversed.
can NOT be reversed.
Which of the following is NOT evidence of a chemical reaction?
Bubbles.
Temperature Change.
A solid precipitate forming.
A phase change from a solid to liquid.
Tearing paper into smaller pieces is a ...
Chemical reaction.
Energy reaction.
Nuclear change.
Physical change.
baking a cake is an example of a ...
Chemical reaction.
Mixture change.
Nuclear reaction.
Physical change.
Mowing the grass is an example of ...
Chemical reaction.
Chemical state.
Physical change.
Physical state.
Carbon is considered an element, while carbon dioxide is considered a compound. This is because carbon dioxide is-
a gas at room temperature.
made of two different elements.
given off by green plants.
useful to human beings.
Rust is an example of a ...
chemical reaction.
physical change.
nuclear reaction.
environmental change.
