Understanding chemical symbols

This task is about molecules, elements and atoms.

Question 1Change answer

periodic table from Hydrogen to Calcium
Use the information in the Periodic Table and your own knowledge to complete the table below.
The first row has been done for you.
  Formula Types of atoms Total number of atoms
CO2 Carbon, oxygen 3
i) H2S
ii) MgCl2
iii) Al(CN)3