How many valence electrons does the elements in group 4A have?

What is the symbol for Tin?

What is the energy level for Florine?

What is the mass of Helium?

How many Neutrons does Li have?

What is the number of protons for Ne?

If Ar has 8 valence electrons, What group is it in?

How many valence electrons does Cl have?

I the element As, a metal, metalloid, or non metal?

how many shells does the element S have

Which element has similar properties as Be?

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