Search over 10,000 free study notes

Nitrogen has 5 valence electrons in its outer shell. Each Hydrogen has 1 valence electron in its outer shell, so the 3 Hydrogens donate 3 electrons in total. This gives 8 valence electrons in total. We...

It is important to stress that universities realise getting work experience is hard, therefore a lack of work experience should not be counted against you.In my experience one week in primary healthcare i...

On the periodic table, Magnesium has the symbol ₁₂Mg²⁴, where 24 is the mass number and 12 is the atomic number. The atomic number is the number of protons found inside an atom, w...

An enzyme is a type of protein that catalyses reactions that occur in the body. In many cases they are essential in order to allow reactions to occur under physiological conditions. There are many differe...

DNA is used to code proteins. This requires two steps: transcription and translation.Transcription is the conversion of double stranded DNA into a single stranded mRNA molecule. DNA nucleotides bind to th...