Question

52 ×2+ how many neutrons in this
25​

Answer 1

Here is your answer:

The number of neutrons = mass number - atomic number

now, 52 - 25 = 27 neutrons are present in the element 'X'

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Answer 2

Answer:

The number of neutrons in the given element is 27.

Explanation:

Assuming that the given atom representation would be

                            $\Big\limits^{52}_{25} X^{2+}$

The general representation of an atom is given by

                            $\Big\limits^{A}_{Z} X^{n{+/-} }$

  In the above X represents the atom

• A is the mass number which is equal to the sum of number of protons and neutrons, $A= Z+N$
• Z is the atomic number which is equal to the number of protons
• n represents the charge

Comparing the given with the general representation,

the charge is 2+, which says that atom is positively charged by removing 2 electrons from the neutral atom.

the number of protons, $Z=25$

the mass number is, $A=52$  

                  $\implies Z+N=52\implies 25+N=52$

                         $\implies N=52-25=27$

Therefore, the number of neutrons is 27.