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
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.
Calculate the number of neutrons in ¹⁷Cl³⁷.
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?
The atomic number of an element is 17. Two of its isotopes have mass numbers 35 and 37. Write their symbols.
Which isotope of carbon is radioactive? (1) ¹²C (2) ¹³C (3) ¹⁴C (4) ¹⁵C
Which isotope of hydrogen has one proton and two neutrons? (1) Protium (2) Deuterium (3) Tritium (4) None
Which of the following is a pair of isotopes? (1) ¹⁶O and ¹⁸O (2) ¹⁶O and ¹⁶N (3) ¹⁴C and ¹⁴N (4) ¹²C and ¹⁴N
Which of the following is a use of radioactive isotopes? (1) Preserving food (2) Making alloys (3) Producing plastics (4) None of these
Fill in the blank: Isobars have different atomic numbers but the same ________ number.
Fill in the blank: Isotopes have the same atomic number but different ________ numbers.
Fill in the blank: The sum of protons and neutrons in an atom is called the ________ number.
Isobars have the same ________ number.
State whether the following statement is true or false: Isobars have different chemical properties.
State whether the following statement is true or false: Isotopes have different physical properties.
True or False: Isobars have the same number of electrons.
True or False: Isobars have the same number of protons.
