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WorksheetsAtoms-Elements-Molecules-Compounds
Total questions: 17
Worksheet time: 12mins
What is at the center of every atom?
nuclear
nucleus
electron
molecule
_ and _ make up the nucleus of an atom.
(a)
An electron of an atom...
lives inside the nucleus and has a neutral charge.
circles the nucleus and has a positive charge.
lives inside the nucleus and has a negative charge.
circles the nucleus and has a negative charge.
The number of protons in an atom is equal to the number of _ .
(a)
The number of _ determines the type of element an atom makes.
(a)
When two or more atoms combine, a _ forms.
(a)
What is a compound?
A molecule that is formed from two different elements/atoms.
A molecule that is formed from two or more of the same element/atom.
A tiny atom that makes up an atom.
The center of an atom that is formed by neutrons. protons, and electrons.
Which of the following cannot be broken down into something simpler?
a compound
an element
a chemical formula
a mixture
A _ is like a recipe because it tells which elements make up a molecule.
(a)
The following can be found on the Periodic Elements...
The number of atoms in a carbon dioxide molecule.
All the compounds that exist in the natural world.
The chemical formula for water.
All the elements that have been discovered or created in a lab.
There are _ elements on the Periodic Table.
(a)
A subscript...
the number of protons in an atom.
the number of molecules present.
shows the number of atoms of a specific element in a compound.
the number an element is on the periodic table.
A coefficient...
the number of protons in an atom.
the number of molecules present.
shows the number of atoms of a specific element in a compound.
the number an element is on the periodic table.
In order for a compound to form, a _ reaction must occur.
(a)
If a compound has 12 carbon atoms, 22 hydrogen atoms, and 11 oxygen atoms, its chemical formula must be...
12C22H11O
C12H22O11
C11H22O12
2C11H22O12
What is the Periodic Table?
A chart that shows all the elements scientists have discovered/created.
A chart that lists all the molecules that exist in the universe.
A chart that tells who discovered each element.
A chart that lists all the molecules found in nature.
The atomic number of an element represents the number of _ in an atom.
(a)
