A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes

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Question 22
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This question is about atomic structure and the periodic table.

Germanium (Ge) is an element that has several isotopes.

a.

Give the meaning of 'isotopes'.

You should answer in terms of subatomic particles.

[2]
b.

Table 1 shows the mass numbers and percentage abundances of two isotopes in a sample of germanium.

Table 1

Mass numberPercentage abundance (%)
7240
7460

Calculate the relative atomic mass (ArA_rAr​) of germanium in this sample.

Give your answer to 1 decimal place.

[2]
c.

Germanium (Ge\text{Ge}Ge) is in Group 4 of the modern periodic table.

Give the numbers of electrons and neutrons in an atom of the isotope 3274Ge{}^{74}_{32}\text{Ge}3274​Ge.

[2]
d.

What is the most likely formula of a germanium(IV) ion?

Select one option:

  • Ge+\text{Ge}^{+}Ge+
  • Ge2+\text{Ge}^{2+}Ge2+
  • Ge4+\text{Ge}^{4+}Ge4+
  • Ge4−\text{Ge}^{4-}Ge4−
[1]
e.

Germanium was discovered 17 years after Mendeleev published his periodic table.

Give two reasons why the discovery of germanium helped Mendeleev's periodic table to become accepted.

[2]

A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes Questions

  1. GCSE
  2. /Chemistry
  3. /A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes