What is the symbol for Hydrogen?

How is the periodic table arranged?

What is the element symbol for Iron?

Which element has an atomic number of 8?

Which element has an atomic number of 19?

What is the element symbol for Sodium?

Which element has 80 electrons?

Which is the element symbol for Phosphorus?

Which element has an atomic number of 47

How many electrons does Sulfur have?

How many protons does Calcium have?

How many electron shells does Hydrogen use?

How many electrons does Silison have?

Which element has an atomic number of 28?

How many protons does Helium have?

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