Isotope Notation Worksheet
A Grade 12 Chemistry worksheet on understanding and writing isotope notation, including atomic number, mass number, protons, neutrons, and electrons.
Includes
Standards
Topics
Isotope Notation Practice
Name:
Date:
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Read each question carefully and provide the best answer. Show all your work for calculations.
1. For the isotope notation below, identify what each number and letter represents:
A: (Mass Number)
Z: (Atomic Number)
X: (Element Symbol)
2. Complete the following table for the given isotopes:
Isotope Notation
Atomic Number (Z)
Mass Number (A)
Protons
Neutrons
Electrons (neutral atom)
²³Na
¹⁴C
³⁵Cl
3. Which of the following pairs represents isotopes of the same element?
¹²C and ¹⁴N
¹⁶O and ¹⁸O
³²S and ³²P
¹H and ²He
4. Write the isotope notation (e.g., ¹²C) for an atom with 19 protons, 20 neutrons, and 19 electrons.
5. An atom of Uranium has an atomic number of 92 and a mass number of 238. Write its isotope notation.
6. All atoms of a given element have the same number of neutrons.
True
False
7. The mass number (A) represents the total number of protons and electrons in an atom.
True
False
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