WorksheetsCompounds
Total questions: 15
Worksheet time: 8mins
What type of model is shown?
a structural formula
a chemical formula
a space-filling model
a ball-and-stick model
What type of model is shown?
a structural formula
a chemical formula
a space-filling model
a ball-and-stick model
In what way is Model B better than Model A?
Model B shows the types of elements in the compound, but Model A does not.
Model B shows the three-dimensional shape of the molecule, but Model A does not.
Model B shows how the atoms in the molecule are connected, but Model A does not.
Model B shows the number of atoms of each element in the molecule, but Model A does not.
What is the chemical formula for the molecule modeled?
CHO
C4H11O2
C6H12O2
C6H9O
How many atoms of nitrogen are in the chemical formula Ni(NO3)2?
2
1
6
3
There are (a) atoms of oxygen in the chemical formula 2Ca(ClO2)2.
How many atoms of each element are in the chemical formula P2O5?
2 phosphorus and 5 oxygen
5 phosphorus and 2 oxygen
1 phosphorus and 5 oxygen
2 phosphorus and 1 oxygen
How many atoms of each element are in the chemical formula Ca(OH)2?
1 calcium, 1 oxygen, and 1 hydrogen
1 calcium, 2 oxygen, and 2 hydrogen
2 calcium, 1 oxygen, and 2 hydrogen
2 calcium, 2 oxygen, and 2 hydrogen
How many atoms of each element are in 4Na3PO4?
3 sodium, 1 phosphorus, 4 oxygen
4 sodium, 4 phosphorus, 4 oxygen
12 sodium, 1 phosphorus, 4 oxygen
12 sodium, 4 phosphorus, 16 oxygen
What does the chemical formula CaCl2 show about the compound it represents?
It is made up of one element.
It is made up of two elements.
It is made up of three elements.
It is made up of four elements.
Which statements describe how chemical formulas, such as H2O, represent compounds? Select three options.
They show the types of molecules that make up an atom.
They show the elements that make up a compound.
They show the three-dimensional shape of a molecule.
They show the types of atoms that make up a molecule.
They show the number of each type of atom in a molecule.
“Na2SO3” represents sodium sulfite.
What does the 4 mean in the formula 4Na2SO3?
There are four atoms of sodium.
There are four atoms of sodium sulfite.
There are four molecules of sodium sulfite.
There are four elements in sodium sulfite
Which statement correctly describes why a compound is a pure substance?
A compound is not a pure substance because each of its molecules is made up of the atoms of two or more different elements.
A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means.
A compound is not a pure substance because it is not an element, and only elements are pure substances.
A compound is a pure substance because it consists of two different elements, which are pure substances.
Which of these is a compound?
O
CO2
O2
Co
Which is the best description of a molecule?
A molecule of an element is composed of at least two types of atoms.
A molecule of a compound is composed of only one type of atom.
A molecule of a compound is composed of at least two types of atoms.
A molecule of an element is composed of exactly two types of atoms.
