Question

based on the periodic table, which of the following groups of elements should have very similar chemical properties?
a. lithium (li), sodium (na), potassium (k)
b. manganese (mn), magnesium (mg), molybdenum (mo)
c. potassium (k), aluminum (al), neon (ne)
d. carbon (c), iodine (i), hydrogen (h)

Explanation:

Elements in the same group of the periodic table have similar chemical properties. Lithium (Li), sodium (Na), and potassium (K) are all in Group 1 (alkali - metals). They have one valence electron, which gives them similar chemical reactivity. The other options contain elements from different groups with different valence - electron configurations and thus different chemical properties.

Answer:

A. lithium (Li), sodium (Na), potassium (K)