GCSE AQA Chemistry Amount of Substance & Gas Volume: This question is about atoms and

Question

This question is about atoms and isotopes.

Atoms contain protons, neutrons and electrons.
A lithium atom has the symbol $_{3}^{7}Li$.
Explain, in terms of sub-atomic particles, why the mass number of this lithium atom is 7.

Amounts of substances can be described in different ways.
Complete the sentences.

One mole of a substance is the relative formula mass in ____________________________.
The relative atomic mass of an element compares the mass of an atom of an element with the mass of an atom of ____________________________.

Two isotopes of oxygen are $_{8}^{16}O$ and $_{8}^{18}O$.
Describe the similarities and differences between the isotopes $_{8}^{16}O$ and $_{8}^{18}O$.
You should refer to the numbers of sub-atomic particles in each isotope.

This question is about atoms and isotopes - AQA - GCSE Chemistry - Question 4 - 2015 - Paper 2

Worked Solution & Example Answer:This question is about atoms and isotopes - AQA - GCSE Chemistry - Question 4 - 2015 - Paper 2

Explain, in terms of sub-atomic particles, why the mass number of this lithium atom is 7.

Complete the sentences.

Describe the similarities and differences between the isotopes $_{8}^{16}O$ and $_{8}^{18}O$.

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