4. Atoms and Elements

Which element has an atomic number of $29$ (i.e., $29$ protons in the nucleus)?

Which of the following is a valid two-letter chemical symbol from the periodic table?

Which element (neutral atom) has 18 electrons?

Which element has 34 protons in its nucleus (i.e., atomic number $34$)?

On the periodic table, the symbol $P$ stands for which element?

Which element has an atomic number of $52$ (i.e., $52$ protons)?

Which element has $28$ protons in its nucleus?

Which element has 47 protons in its nucleus?

Which element has the longest name on the periodic table?

Which element has the largest atomic number?

Which letter is not used in any official chemical element symbol on the periodic table?

Which element has $33$ protons in its nucleus?

Which element has 35 protons in its nucleus?

Which element (neutral atom) has 7 electrons?

Which element has 75 protons in its nucleus?