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(Taken from GCSE WJEC Additional Science Book- First Published in 2012) and I have adapted the answer given.Relative atomic masses: Li = 7 ; S= 32 ; O=161) Calculate molecular mass of lithium sulfate (Li2...

Calcium has 20 electrons.
The first ring can only contain up to 2 electrons.After that rings can only contain up to 8 electrons.
Therefore the electronic config...

The Atomic radius of an atom represents its atomic size. More specifically, it refers to the half-distance between the two nuclei of two adjacent atoms of the same element. In the periodic table, across a...

Write the equation: NaOH + HA --> NaA + H₂O. Find the moles of A^-: the moles of A^-= the moles of NaO...

Write the equation: PbO + HNO₃ --> PbNO₃ + H₂O. Balance the equation: there are two moles of hydrogen (in water) on the right. To bala...