WorksheetsC2 Atoms, Elements, Molecules, Mixtures, and Compounds
Total questions: 12
Worksheet time: 6mins
What is a molecule?
A group of two or more atoms held together by chemical bonds
A substance that contains two or more different elements
A mixture of two or more substances that are not chemically combined
A single atom
Which of the following are examples of a molecule?
Carbon dioxide
Oxygen
Water
Helium
What is a compound?
A single atom
A mixture of two or more substances that are not chemically combined
A substance that contains two or more different elements
A group of two or more atoms held together by chemical bonds
Which of the following is an example of a compound?
Chlorine
Helium
Water
Oxygen
What is the formula for water?
NaCl
H2O
H2SO4
CO2
What is the formula for carbon dioxide?
H2O
CO2
CO
H2SO4
What is the formula for calcium hydroxide?
CaO
CaOH
CaOH2
Ca(OH)2
Which of the following is true about mixtures?
They are a single atom
They are a group of two or more atoms held together by chemical bonds
They are substances that contain two or more different elements
They are two or more substances that are not chemically combined
How can mixtures be separated?
Through chemical reactions
Through gravitational separation
Through physical methods like filtration, crystallization, or distillation
Through nuclear reactions
What is a substance that cannot be broken down into simpler substances by chemical means?
A compound
An element
A mixture
A molecule
a mixture that has the same composition throughout the entire substance
heterogenous mixture
homogenous mixture
pure substance
matter
a mixture that has a different composition throughout the substance
heterogenous mixture
compound
homogeneous mixture
element
