Question

which pair of elements has similar properties? use your periodic table to answer the question.
lithium (li) and boron (b)
sodium (na) and helium (he)
lithium (li) and potassium (k)
carbon (c) and neon (ne)

Explanation:

Elements in the same group (vertical column) of the periodic table have similar properties. Lithium (Li) is in Group 1, and Potassium (K) is also in Group 1. Lithium (Li) and Boron (B) are in different groups (Group 1 and Group 13 respectively). Sodium (Na) is in Group 1 and Helium (He) is in Group 18. Carbon (C) is in Group 14 and Neon (Ne) is in Group 18.

Answer:

Lithium (Li) and Potassium (K)