4. Atoms and Elements

Which of the following is a valid two-letter chemical symbol for an element on the periodic table?

On the periodic table, which element has the symbol $T$?

Which element has 24 protons in its nucleus?

Which element has $53$ protons (atomic number $53$)?

Periodic Table: Element Symbols — Which element is a major component of chlorophyll at the center of its porphyrin ring?

Which element makes up most of Earth's atmosphere?

How many protons are in a neutral atom of tellurium (Te)?

Which element has more protons: tin or iodine?

Which element has 56 protons in its nucleus?

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)?