Question

answer the following questions about the reactivity of metals and nonmetals. be sure to explain your reasoning using the periodic table (groups, periods, and valence electrons). metals (reactivity trends) 1. arrange these metals in order of most reactive to least reactive: sodium (na), calcium (ca), potassium (k), aluminium (al). - why did you put them in this order?

Explanation:

Step1: Recall periodic - table trends

Metals' reactivity increases down a group and decreases across a period from left to right.

Step2: Locate elements in periodic table

Potassium (K) and sodium (Na) are in Group 1 (alkali metals), calcium (Ca) is in Group 2 (alkaline - earth metals), and aluminum (Al) is in Group 13. K is below Na in Group 1, so K is more reactive than Na. Ca is to the right of Na in the periodic table but in a different group. Al is further to the right in the periodic table.

Step3: Determine reactivity order

Based on the trends, the order of reactivity from most reactive to least reactive is Potassium (K) > Sodium (Na) > Calcium (Ca) > Aluminum (Al).

Answer:

Potassium (K) > Sodium (Na) > Calcium (Ca) > Aluminum (Al)