Question

The element radium has a mass number of 226 and an atomic number of 88. How many neutrons does an atom of radium have?(1 point)
88

226

138

314

Answer 1

# protons + # neutrons = mass number

Answer 2

I don't think that actually answers the question

Answer 3

But it most certainly does actually answer the question. Sorry, I didn't realize I had to draw you a picture.
atomic number Ra in the problem = 88. That's the number of protons. Plug it in.
# neutrons = ?
mass number of Ra in the problem = 226. Plug it in.
Solve for # neutrons.
88 + ? = 226
? = 226 - 88 = 138

Answer 4

1.
138

2.
the conversion of an atom of one element into a different element through nuclear changes

3.
A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the total mass before and after change

4.
82

5.
Some of the matter is converted into energy

Answer 5

Thank you for your help on the first question DrBob222

Answer 6

Thanks guys!!

Answer 7

100% @ Doing my part to help.

Answer 8

Which connections state are you from?

I'm from south carolina

Answer 9

New Mexico

Answer 10

Texass

Answer 11

Thank you

Answer 12

"Doing my part to help"is 100% correct tysm!

Answer 13

Unit 4 Lesson 2:
Energy Release Quick Check
1. 138
2. The conversion of an atom of one element into a different element through nuclear changes.
3. A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the total mass before and after the change.
4. 82
5. Some of the matter is converted to energy.

Answer 14

Thank youuuu

Answer 15

Thanks