memecurll memecurll

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 :

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

Otras preguntas

I just need help with 1-8 Only answer if u know it. PLEASE HELP!!!!!

The environmental conditions listed in the box below best describe which colonial region? • broad, coastal plains and hilly forests • year-round warm climate •

Gary's unpaid credit card balance is 2543.32. His APR is 17.4%, and he made one new translation for 320 What is his new balance

How do gene interactions affect gene expression?

What transformation is represented by the rule (x, y)→(−y, x)

Write at least 50-100 words about social standard in whites and black when it comes to poverty.

Hello its __ What is the rest?? Hints *It was a hit in 2016 *The singer is Adele *It was about her calling her bf Whoever solves with the most "brainliest answ

6x=-16 help me pleaseee

Please explain whether it's true or false? Thanks

Which scale factors produce an expansion under a dilation of the original image? Select each correct answer. 8 0.7 0.8 7 Thank you. :)