Question

comparing reactivity of different m rank the metals from most reactive (1) to least reactive (3). tantalum: 1 niobium: 2 dubnium: 3

Explanation:

Step1: Recall metal reactivity knowledge

Based on general chemistry knowledge of metal reactivity.

Step2: Identify ranking

Tantalum is more reactive than Niobium, and Niobium is more reactive than Dubnium among these three.

Answer:

Tantalum: 1
Niobium: 2
Dubnium: 3