Question

element name
how many?
2 p+
3 n°
2 e-
how many stable isotopes of this element can you make?
checkone
stable
unstable
symbol

Explanation:

Step1: Identify element by proton number

The number of protons ($p^{+}$) determines the element. Here, the number of protons is 2.

Step2: Recall element with 2 protons

The element with 2 protons is helium. Its symbol is $He$.

Step3: Determine stable isotopes

Helium - 3 and helium - 4 are the stable isotopes of helium. So there are 2 stable isotopes.

Answer:

Element Name: Helium
Symbol: $He$
Number of stable isotopes: 2