For fe, its atomic number is 26 and its mass number is 56. how many neutrons does it have? a 26 b 30 c 56 d 82 plato

Answer : The correct option is, (B) 30

Explanation :

Atomic number : It is defined as the number of protons or number of electrons.

Atomic number = number of protons = number of electrons

Atomic mass : It is defined as the sum of number of protons and number of neutrons.

Atomic mass = Number of protons  + Number of neutrons

or,

Atomic mass = Atomic number  + Number of neutrons

As we are given that,

The element is. Fe

Atomic number = 26

Mass number or atomic mass = 56

Atomic mass = Atomic number  + Number of neutrons

Number of neutrons = Atomic mass - Atomic number

Number of neutrons = 56 - 26

Number of neutrons = 30

Therefore, the number of neutrons are, 30

i think it is true since you can test the answer and can use observations to complete it.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.