Question

what is a column called in the periodic table and what do the elements in each column have in common? a period; the same atomic masses b group; the same number of electrons c period; the same number of atomic orbitals d group; the same number of valence electrons the alkali metals, found in group 1 of the periodic table are reactive metals that do not occur freely in nature. these metals have only one electron in their outer shell. therefore, they readily lose that electron to form ionic bonds with other elements. sodium (na) is a metal that bonds with chlorine (cl) to form table salt (nacl). based on what the periodic table can tell you about these two elements, explain how and why they bond to form nacl.

Explanation:

Columns in the periodic table are called groups. Elements in the same group have the same number of valence electrons, which determines their chemical - reactivity and bonding behavior. Sodium (Na) in group 1 has 1 valence electron and chlorine (Cl) in group 17 has 7 valence electrons. Sodium donates its valence electron to chlorine to form an ionic bond in NaCl as sodium becomes a positively charged ion (Na⁺) and chlorine becomes a negatively charged ion (Cl⁻).

Answer:

What is a column called in the periodic table: Group.
What do the elements in each column have in common: The same number of valence electrons.
Based on what the periodic table can you about these two elements (Na and Cl) to form NaCl: Sodium in group 1 has 1 valence electron and readily donates it, while chlorine in group 17 needs 1 electron to complete its outer shell, so they form an ionic bond.