Isotopes in Chemistry
This worksheet explores the concept of isotopes, their properties, and applications in chemistry, suitable for Grade 12 students.
Includes
Standards
Topics
Isotopes in Chemistry
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which of the following best defines an isotope?
Atoms of the same element with different numbers of protons.
Atoms of different elements with the same number of neutrons.
Atoms of the same element with different numbers of neutrons.
Atoms of different elements with the same atomic mass.
2. Carbon-12 and Carbon-14 are isotopes. How do they differ?
Carbon-14 has two more protons than Carbon-12.
Carbon-14 has two more neutrons than Carbon-12.
Carbon-14 has two more electrons than Carbon-12.
Carbon-14 has a different atomic number than Carbon-12.
3. The atomic number of an element is determined by the number of in its nucleus.
4. Isotopes of an element have the same number of protons but different numbers of .
5. The sum of protons and neutrons in an atom's nucleus is called the number.
6. Explain why isotopes of an element exhibit similar chemical properties but different physical properties.
7. Describe one practical application of isotopes in science or medicine.
8. All isotopes of an element are radioactive.
True
False
9. The atomic mass listed on the periodic table is a weighted average of the masses of an element's naturally occurring isotopes.
True
False
10. Consider the following representation of an atom:
a) How many protons does this atom have?
b) How many neutrons does this atom have?
c) What is the mass number of this atom?