Chemistry 9701 · AS & A Level · The Periodic Table: chemical periodicity

The Periodic Table: chemical periodicity — practice question

Vanadium, niobium and tantalum are metals that sit in the same group of the Periodic Table.
(a(i))[1]

State the meaning of the term ground state.

(a(ii))[1]

Show the electronic configuration of vanadium using electrons in boxes notation.

(a(iii))[1]

Deduce the total number of electrons in the p sub-shells in a vanadium atom.

(b(i))[2]

Complete Table 1.1 for the isotopes $^{93}_{41}\text{Nb}$ and $^{181}_{73}\text{Ta}$, giving the proton number and the neutron number.

(b(ii))[2]

Define the term relative isotopic mass.

(b(iii))[2]

A sample of pelopium is made up of $90.9\%$ by mass $^{93}_{41}\text{Nb}$ and $9.1\%$ by mass $^{181}_{73}\text{Ta}$. Calculate the theoretical relative atomic mass of pelopium from these data and Table 1.1. Give your answer to two decimal places. Show your working.

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