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WorksheetsExploring Chemistry Concepts
Total questions: 10
Worksheet time: 5mins
What is the first element on the periodic table?
Oxygen
Carbon
Helium
Hydrogen
How many elements are in the periodic table?
120
115
100
118
What is the smallest unit of an element?
atom
compound
molecule
ion
What do we call a substance made of two or more different elements?
Element
Mixture
Compound
Solution
What is the chemical formula for water?
H2O2
HO2
H2O
O2H
What is the charge of a proton?
0 elementary charge
+2 elementary charge
+1 elementary charge
-1 elementary charge
What is the difference between an atom and a molecule?
A molecule is always larger than an atom, regardless of the element.
An atom is a group of molecules, while a molecule is a single element.
An atom is a single unit of an element, while a molecule is a group of two or more atoms bonded together.
Atoms can exist independently, but molecules cannot.
What is the term for a substance that cannot be broken down into simpler substances?
Element
Mixture
Solution
Compound
What is the chemical symbol for gold?
Fe
Ag
Au
Pb
What do we call a group of atoms bonded together?
Molecule
Ion
Compound
Element
