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
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
Texass
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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.
"Doing my part to help"is 100% correct tysm!
Thank you for your help on the first question DrBob222
Which connections state are you from?
I'm from south carolina
I don't think that actually answers the question
New Mexico
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Thank youuuu
Thank you
Thanks
# protons + # neutrons = mass number
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