4. Atoms and Elements

Which element is located in Group 2 (alkaline earth metals) and Period 3 of the periodic table?

In the context of the periodic table and element symbols, which element is commonly used for shiny trim on cars (often as chrome plating)?

Which element has $32$ protons (atomic number $32$)?

Which element has 4 protons in its nucleus?

Which element has an atom with 14 protons (atomic number 14)?

Which element has $67$ protons in its nucleus?

Which element has an atomic number of 16?

In the periodic table, what is the last element in period 4 (the element at the far right of the fourth row)?

In the periodic table, is "Co" a valid chemical symbol for an element?

Which element is the most abundant in Earth’s crust by mass?

Which element has the longest official IUPAC element name?

Which element has 23 electrons in a neutral atom?

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

Which element has 15 protons in its nucleus?

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