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WorksheetsElements & Compounds
Total questions: 20
Worksheet time: 10mins
Which of the following is the best description of an element?
A substance that cannot be broken down into simpler substances.
A naturally occurring mineral made of more than one substance.
A small particle made with a specific chemical composition.
A collection of atoms that have different abilities when joined together.
Provided is a list of five different substances.
NaOH Cu H2O N2 H2
How many of these substances are elements?
2
3
4
5
Which element is one of the most abundant in both solid parts of Earth and in living matter?
Carbon
Oxygen
Nitrogen
Phosphorus
Which element makes up most of Earth's atmosphere?
Hydrogen
Carbon
Oxygen
Nitrogen
Below is a list of some substances and their symbols.
Oxygen O
Sodium Chloride NaCl
Gold Au
Neon Ne
How many of these substances are an example of an element?
1
2
3
4
How are elements and compounds different?
A compound is represented by a chemical formula, and elements are represented by a chemical symbol.
Compounds are represented by chemical symbols of one letter, and elements are represented by symbols of two letters.
Elements are pure substances, and compounds are not.
Elements are always larger units of matter, and compounds are smaller.
How many elements are in the compound Fe2O3?
0
1
2
3
Which "sphere" includes all water?
Hydrosphere
Lithosphere
Atmosphere
Biosphere
Which 'sphere' has oxygen and nitrogen as its two main elements?
Lithosphere
Biosphere
Atmosphere
Hydrosphere
Which 'sphere' has oxygen and carbon as its two main elements?
Atmosphere
Lithosphere
Hydrosphere
Biosphere
Oxygen and ____ are the main elements found in the Lithosphere!
Silicon
Carbon
Nitrogen
Aluminum
Which 'sphere' has oxygen and hydrogen as its two main elements?
Atmosphere
Biosphere
Lithosphere
Hydrosphere
Hydrogen is considered an element, while hydrogen peroxide is considered a compound. This is because hydrogen peroxide is...
is used for cleaning wounds.
made of two different elements.
is a liquid.
useful to human beings.
The smallest particle of matter
Element
Compound
Atom
Chemical
Rocks are primarily composed of which two elements?
Hydrogen and Oxygen
Oxygen and Silicon
Calcium and Hydrogen
Carbon and Nitrogen
All of the following elements are major components of soil on Earth except:
Oxygen
Iron
Hydrogen
Calcium
The hydrosphere is mostly comprised of Hydrogen and ...
Oxygen
Silicon
Carbon
Hydrogen
Which of the following three elements are most abundant in the lithosphere?
Aluminum, oxygen, and silicon
Oxygen, carbon, and hydrogen
Silicon, nitrogen, and calcium
Nitrogen, oxygen, and silicon
Which two elements are most common in both the hydrosphere and biosphere?
Hydrogen and oxygen
Nitrogen and oxygen
Calcium and nitrogen
Oxygen and carbon
All of the following elements are major components of plants on Earth except...
Carbon
Oxygen
Nitrogen
Iron
