Answer:
Part a:
Isobars: Ca-41, K-41 and Ar-41
Part b:
Number of proton
Part c:
Incorrect statement
Explanation:
Part a:
Nuclei with same mass number are called isobars.
Given:
Ca-40, Ca-41, K-41 and Ar-41
Ca-41, K-41 and Ar-41 have equal mass numbers, so these are isobars.
Part b:
Atomic number of Ca = 20
Atomic no. = Number of proton.
So, Ca-40 ans C-41 have same number of proton or in other words proton count is common in both.
Part c:
Number of neutrons in Ca-41
Atomic number = 20
Mass number = 41
Number of neutron = Mass number -atomic number
= 41 -20 = 21
Number of neutrons in K-41
Atomic number = 19
Mass number = 41
Number of neutron = Mass number -atomic number
= 41 -19 = 22
Number of neutrons in Ar-41
Atomic number = 18
Mass number = 41
Number of neutron = Mass number -atomic number
= 41 -18 = 23
So, the statement is incorrect.
