2. Atoms & Elements

Which element is the only metalloid in period 3 of the periodic table?

Which of the following is a lanthanide element?

Which element was discovered by Marie and Pierre Curie?

Which element has a total of two occupied principal energy levels?

In which block of the periodic table is chromium (Cr) found?

Which of the following period 3 elements is least likely to react naturally under standard conditions?

Which group of representative elements contains atoms with three valence electrons in their ground state?

Which of the following elements is an alkali metal with fewer than 10 protons in its nucleus?

Which element in period 4 of the periodic table is the most chemically active non-metal?

Which of the following elements can be found in the second period of the periodic table?

Where on the periodic table are the most active metals typically located?

Which element in period 3 of the periodic table is classified as a metalloid?

Which of the following lists contains the eight most abundant elements in Earth's crust?

Which of the following lists contains the eight most abundant elements in Earth's crust?

Which of the following is a period 3 nonmetal that is less reactive than sulfur?