Answer-
For any element, atomic number = number of protons in the nucleus
For the element X
Atomic number is 34, so the number of protons in nucleus = 34
Now, mass number of an atom = number of protons in the nucleus + number of neutron in the nucleus
For X
Mass number = 80
80 = 34 + number of neutron in the nucleus
Number of neutrons in the nucleus = 80 - 34 = 46
Now for the ion X-2
The charge on the atom is -2
This means that there is excess of 2 unit negative charge on the atom
Now we know that in an atom, negative charge is due to the electrons and positive charge is due to the protons
So -2 charge means that there is excess of 2 electrons in the atom as compared to the number of protons
So the number of electrons = number of protons + 2
Number of electrons = 34 + 2 = 36
Hence the right option is:
b) Electrons = 36, Protons = 34 and Neutrons = 46
Page 3 Page 4 stion 11 (2 points) A hypothetical element X has atomic number =...
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