Question

Rank the metals from most reactive (1) to least reactive (3). Tantalum: Niobium: Dubnium:

Answer 1

Metals react by lose of electrons. Reactivity increases down a group since the valence electrons are further from the nucleus. In this case arranging these elements with respect to their atomic number we have:Niobium =41,Tintalum =73 and Dubnium =105. They are all in group 5 and thus since the reactivity increases down the group the order of the reactivity is :Dubnium, Tintalum and Niobium.

Answer 2

Answer:

tantalum: 2

niobium: 3

dubnium: 1

Explanation: