Isotopes and Isobars
Chemistry ⇒ Atomic Structure and the Periodic Table
Isotopes and Isobars starts at 8 and continues till grade 12.
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See sample questions for grade 8
Calculate the number of neutrons in ¹⁷Cl³⁷.
Describe how isotopes are represented symbolically.
Describe one difference between isotopes and isobars.
Explain why isobars have different chemical properties.
Explain why isotopes of an element have different mass numbers.
Explain why isotopes of the same element have similar chemical properties.
Give an example of a pair of isobars.
If ²⁰Ne and ²⁰F are compared, what are they to each other?
If an atom has 11 protons and 12 neutrons, what is its mass number?
If two atoms have the same number of protons but different numbers of neutrons, what are they called?
State one use of isotopes in medicine.
The atomic number of an element is 17. Two of its isotopes have mass numbers 35 and 37. Write their symbols.
What are isobars?
What are isotopes?
A scientist discovers two atoms: Atom X has 19 protons and 21 neutrons, Atom Y has 20 protons and 20 neutrons. Are Atom X and Atom Y isobars? Explain your answer.
An element has two naturally occurring isotopes: Isotope A with a mass number of 63 and Isotope B with a mass number of 65. If the atomic number of the element is 29, calculate the number of neutrons in each isotope.
Describe how the number of protons, neutrons, and electrons differ between a pair of isobars.
