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

Who was the first scientists?

What is stress, and what does it cause?

At which point do the graphs of the equations below intersect? y= -9x + 4 and y = 3x - 2

Which of the following is a benefit associated with regional economic integration? A. Trade creation B. Trade diversion C. Loss of jobs D. Loss of sovereignty

(3x - 4)(3x + 4) what’s the answer?

This is for my final grade before spring break please help me asap noww

What does the author want readers to understand about popularity and bullying?

CORRECT THESE FOR ME ASAP PLEASE

A is made up of a sugar, a nitrogenous base, and a phosphate group.O Nucleotide O Amino AcidO PhospholipidO Glycoprotein

answer the fallowing