if na reacts with chlorine to form nacl, which of the following elements reacts with na to form an ionic…

if na reacts with chlorine to form nacl, which of the following elements reacts with na to form an ionic compound in a one - to - one ratio, and why?\na k, because it is in the same group as na.\nb mg, because its mass is similar to that of na.\nc ar, because its mass is similar to that of cl.\nd br, because it has the same number of valence electrons as cl.

if na reacts with chlorine to form nacl, which of the following elements reacts with na to form an ionic compound in a one - to - one ratio, and why?\na k, because it is in the same group as na.\nb mg, because its mass is similar to that of na.\nc ar, because its mass is similar to that of cl.\nd br, because it has the same number of valence electrons as cl.

Answer

Brief Explanations:

Elements in the same group of the periodic table have similar chemical properties. Sodium (Na) is in Group 1 (alkali metals). Potassium (K) is also in Group 1. When Na reacts with Cl to form NaCl (1:1 ratio), K, being in the same group as Na, will react with Cl in a 1:1 ratio to form KCl. Magnesium (Mg) is in Group 2 (alkaline - earth metals) and will form compounds like MgCl₂ (1:2 ratio). Argon (Ar) is a noble gas (Group 18) and is inert. Bromine (Br) is in Group 17 (halogens) and reacts with metals, but its reaction ratio with Group 1 metals is 1:1 (similar to Cl), but the question is about which element reacts with Na (as a metal) to form an ionic compound in 1:1. However, the key is the group similarity for the metal part. Since the question is about the metal (to form 1:1 ionic compound with Cl, similar to Na - Cl), and K is in the same group as Na.

Answer:

A. K, because it is in the same group as Na.