This question is about the element sulfur and its compounds.
Use words from the box to complete the sentences about sulfur. Each word may be used once, more than once, or not at all.
| electrons | negative | neutral | neutrons |
| nucleus | positive | protons | shells |
An atom of sulfur has a central __________ that contains particles called __________ and __________. Around these particles there are __________ orbiting in __________.
An atom of sulfur has no charge because it contains equal numbers of __________ and __________.
The particles with the lowest mass in an atom of sulfur are called __________.
Ammonium sulfate is a compound with the formula (NH4)2SO4\text{(NH}_4\text{)}_2\text{SO}_4(NH4)2SO4.
How many different elements are there in (NH4)2SO4\text{(NH}_4\text{)}_2\text{SO}_4(NH4)2SO4?
What is the total number of atoms in the formula (NH4)2SO4\text{(NH}_4\text{)}_2\text{SO}_4(NH4)2SO4?
41 exam-style questions on Edexcel IGCSE Chemistry Atomic structure. Each one has a worked solution and a mark scheme showing where the marks go.