The composition of atoms and ions can be determined from knowledge of atomic number, nucleon number and charge. (a) Complete the table. atomic number nucleon number number of electrons number of protons number of neutrons symbol :---: :---: :---: :---: :---: :---: 3 2 $^{6}_{3}\text{Li}^{+}$ 23 26 32 (b) Boron occurs naturally as a mixture of two stable isotopes, $^{10}\text{B}$ and $^{11}\text{B}$. The relative isotopic masses and percentage abundances are shown. isotope…

Chemistry 9701/22 — May/June 2017

Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme

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Topics Atoms, Molecules and Stoichiometry · Nitrogen and Sulfur · Chemical Energetics · Reaction Kinetics · Equilibria · Group 17 · +7 more

Q1Atoms, Molecules and StoichiometryFree sample

The composition of atoms and ions can be determined from knowledge of atomic number, nucleon number and charge.

(a)

Complete the table.

atomic number	nucleon number	number of electrons	number of protons	number of neutrons	symbol
3		2			$^{6}_{3}\text{Li}^{+}$
		23	26	32

(b)

Boron occurs naturally as a mixture of two stable isotopes, $^{10}\text{B}$ and $^{11}\text{B}$ . The relative isotopic masses and percentage abundances are shown.

isotope	relative isotopic mass	abundance / %
$^{10}\text{B}$	10.0129	19.78
$^{11}\text{B}$	to be calculated	80.22

(i)

Define the term relative isotopic mass.

(ii)

Calculate the relative isotopic mass of $^{11}\text{B}$ .

Give your answer to six significant figures. Show your working.

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3 more questions

Q2Nitrogen and Sulfur13M
Q3Chemical Energetics · Reaction Kinetics · Equilibria · Group 17 · Atoms, Molecules and Stoichiometry18M
Q4Introduction to Organic Chemistry · Chemical Bonding · Hydrocarbons · Hydroxy Compounds · Carboxylic Acids and Derivatives · Carbonyl Compounds · Analytical Techniques23M

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