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

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Question 37
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This question is about atomic structure and the periodic table. Germanium (Ge\text{Ge}Ge) is an element that has several isotopes.

a.

Give the meaning of 'isotopes'. You should answer in terms of subatomic particles.

[2]
b.

The table below shows the mass numbers and percentage abundances of two isotopes of germanium in a specific sample.

Mass numberPercentage abundance (%)
7240
7460

Calculate the relative atomic mass (ArA_{\text{r}}Ar​) 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 ion?

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

Germanium was discovered seventeen 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