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WorksheetsIsotopes
Total questions: 8
Worksheet time: 6mins
What are isotopes?
Isotopes are atoms of the same element with different mass numbers.
Isotopes are atoms of different elements with different mass numbers.
Isotopes are atoms of different elements with same mass numbers.
Isotopes are atoms of the same element with the same mass.
Which of the following statements holds true for the isotopes Chlorine-35 and Chlorine-37?
They have similar physical properties.
They have different chemical properties.
They have similar chemical properties.
They have different atomic numbers.
The composition of the nuclei of two atomic species X and Y is as follows:
X – 6 protons, 6 neutrons
Y – 6 protons, 8 neutrons
What is the mass number of both X and Y and what is the relation between X and Y.
Mass number “X” = 12, Mass number “Y” = 12; atoms
Mass number ”X” = 14, Mass number ”Y” = 12, isotopes
Mass number ”X” = 12, Mass number ”Y” = 14, isotopes
Mass number “X” = 14, Mass number “Y” = 14, isotopes
Identify the element represented in Question 3.
Mg
Na
C
N
Bromine occurs naturally in two stable isotopic forms - 3579Br, 35 81Br.
If the natural abundance of Bromine-79 and Bromine-81 is 49.7 per cent and 50.3 per cent, respectively, what is the average atomic mass of bromine?
80.5 u
80
80 u
79 u
Identify the number of neutrons present in 3579Br and 35 81Br.
45 and 46
44 and 46
46 and 44
46 and 45
What name is given to a pair of atoms such as 14 7N and 157N?
Isobar
Isotone
Isotope
Isochoric
14 7N and 157N have different ………………..
Electronic configuration
Atomic number
Boiling points
Chemical properties
