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

Cartoon by Jeff Parker, courtesy of politicalcartoons.com Who is the intended audience for this political cartoon?

This fiery abolitionist spoke out harshly against slavery as publisher of his own newspaper the liberator:

Which situation is modeled by the graph? A.) the height of a jump rope being used over time B.) the height of an elevator over time C.) the height of a commuter

Karen, a famous botanist, propagates thousands of spider plants in her greenhouses. She uses a small cluster of plant cells and grows them first in a nutrient b

write an equation of the line with the given slope that passes through the given point:

2 over 3 times 5 show your answer as a multiplication equation of a whole number and a fraction

Problem page the sum of two numbers is 47 . the larger number is 17 more than the smaller number. what are the numbers?

20 POINTS TO KILL A MOCKINGBIRD In Chapter 8, Atticus became concerned because the snowman the children made: used the same clothes Atticus wore was poor

What can prevent wind erosion?

you decide to cash out you're CD early. What will happen? A.You will be able to invest in other stockes. B. You will be penalized with high fees. C. You will ro