2. Atoms & Elements

Which group on the periodic table contains elements with two valence electrons?

In the periodic table, what is the term used to refer to the columns?

Which of the following is the correct name for the elements in group 17 of the periodic table?

Which of the following elements located in group 16 of the periodic table has an atomic number of 8?

Which of the following elements would have physical and chemical properties most similar to chlorine?

Which family on the periodic table includes elements with atomic numbers 57 through 71?

What is the term used to refer to the columns in the periodic table?

Which term is used to refer to a column on the periodic table?

Which of the following elements would have similar chemical properties to sulfur?

Which group of elements on the periodic table is generally considered the least reactive?

Which of the following groups of elements tend to form cations?

Which principle did Mendeleev use to organize elements into groups in his periodic table?

Which halogen element has 5 energy levels in its atoms?

Which group number on the periodic table is known as the alkali metals?

An element with the valence electron configuration 6s^2 6p^6 belongs to which period and group on the periodic table?