Answer:
Explanation:
uestion
If an atom of an element has a mass number of 45 and it has 20 neutrons in its nucleus, what is the atomic number of the
element?
Isotopes
Mass atom of Neon: 20.1797 amu
Mass atom X = mass isotope 1 . % + mass isotope 2.% +.....

Answer:
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Explanation:
1. Cylinder
2. Sphere
3. Rectangular prism
4. Cone
Hope this can help.