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 11
Define isobars with an example.
Explain why isobars have different chemical properties.
Explain why isotopes of an element have the same chemical properties but different physical properties.
Explain why the atomic masses of most elements are not whole numbers.
Give the number of protons, neutrons, and electrons in ¹⁸O²⁻.
State one difference between isotopes and isobars.
State one use of isotopes in medicine.
The atomic number of sodium is 11. How many protons and neutrons are present in ²³Na?
Which of the following are isobars? (1) ¹⁴C and ¹⁴N (2) ¹²C and ¹⁴C (3) ¹⁶O and ¹⁶N (4) ²⁰Ne and ²⁰Na
Which of the following is not an isotope of hydrogen? (1) Protium (2) Deuterium (3) Tritium (4) Helium
Which of the following pairs are isobars? (1) ⁴⁰K and ⁴⁰Ca (2) ¹⁴C and ¹⁴N (3) ¹²C and ¹²N (4) ¹⁶O and ¹⁶N
Which of the following pairs are isotopes? (1) ¹²C and ¹⁴C (2) ¹²C and ¹²N (3) ¹⁴N and ¹⁴C (4) ¹⁶O and ¹⁸O
Fill in the blank: The isotope of hydrogen with one proton and two neutrons is called ________.
Fill in the blank: The mass number of an atom is equal to the sum of the number of protons and ________.
Isobars have the same ________ but different ________.
Isotopes of an element have the same ________ number but different ________ numbers.
State whether the following statement is true or false: Isobars have the same number of protons.
State whether the following statement is true or false: Isotopes have different atomic numbers.
True or False: Isobars always belong to the same element.
True or False: Isotopes can be separated by physical methods based on their mass differences.
