If an element has 11 protons and 11 neutrons in its nucleus it
must be:
a Helium
b Sod...
![Chemistry](/tpl/images/cats/himiya.png)
Chemistry, 07.09.2021 04:00, loveagirl111puppy
If an element has 11 protons and 11 neutrons in its nucleus it
must be:
a Helium
b Sodium
c Potassium
d Nitrogen
![answer](/tpl/images/cats/otvet.png)
Answers: 1
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