What is the atomic number of magnesium?

How many electrons does fluorine have?

How many neutrons does carbon-50 have?

What is the mass number of sulfur?

What is the mass number of aluminum-100?

How many protons does krypton have?

How many neutrons does calcium have?

What is the atomic mass of nickel?

How many protons does arsenic-100 have?

How many electrons does iron have?

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