muzzettemm11 muzzettemm11

02-12-2017
Physics

contestada

How many neutrons does an element have if its atomic number is 45 and its mass number is 161

Respuesta :

hossan1 hossan1

02-12-2017

Proton and electron same
proton and the atomic number is same
So mass (-) atomic number
which is 161-45= 116
answer is 116 :)

Answer Link

andriansp andriansp

03-12-2017

Here is the formula that you need to know for this problem:
Number of proton (atomic number) + Number of neutrons = Mass number

So,

45 + Number of Neutrons = 161

Number of neutrons = 161 - 45

Number of Neutrons = 116

Answer Link

Otras preguntas

E = mv^2 Work out the value of E when m = 3 and v = 10

a bicyclist rides 1/5 mile in 1/65 hour. Write this rate as a unit rate

A basketball player achieves a hang time of 0.773 s in dunking the ball. What vertical height will he attain? The acceleration of gravity is 9.8 m/s^2 .

Why is man a special creature? What two worlds does he share in?

what is the main functions of lipids?

a rectangular prism has a length of 2x^2+2x-24 over 4x^2+x, a width of x^2+x-6 over x+4, and a height of 8x^2+2x over x^2-9. For all values of x for which it is

There are 21 males in the algebra 1 class. If 75% is female, how many students are there in the class?

a bicyclist rides 1/5 mile in 1/65 hour. Write this rate as a unit rate

a bicyclist rides 1/5 mile in 1/65 hour. Write this rate as a unit rate

In class 6, 80percent of the children like crisps. 75percent of the children who like crisps also like chocolate. In class 6 what percentage of the children lik