How many neutrons does element X have if its atomic number is 31 and its mass number is 90?

Question

03-06-2018
Physics

contestada

How many neutrons does element X have if its atomic number is 31 and its mass number is 90?

Respuesta :

Otras preguntas

three snack bars contain 1/5,0.22,and 19% of their calories from fat. which snack bar contains the least amount of calories from fat ?

I am two numbers, the sum of my numbers is 100, the difference between my two numbers is 30,

Show that 9x^2-17x-85=0 give you solutions to 3 correct significant figures There are two possible answers for x

How is the ecological system organized?

Why did Allies plan to land in Normandy and not somewhere else?

what was the first industry to be regulated by the united states goverment? a. oil b.meat packing c. steel D.

The function f(t) = −5t 2 + 20t + 60 models the approximate height of an object t seconds after it is launched. How many seconds does it take the object to hit

Why did the goverment ration goods for people to buy?

Bethany's dog eats 450 grams of food per day. How many kilograms does the dog eat in a week

Porshia Porshia · Answer 1 · 2018-06-03T00:17:43+02:00

Porshia Porshia

03-06-2018

Things you need to know:
Atomic number= protons,
Protons + neutrons= mass number.
This means 31 + x = 90
Subtract 31 from both sides and you get x= 59
Answer is 59 neutrons

Answer Link