What decides whether an atomic mass is a whole number or not Animation Play

What elements are carbohydrates composed of? Animation Play

What is cracking? Whiteboard exercise Play

What is cracking? Student activity Play

Why are hydrogen atoms bonded to sp2 carbon atoms deshielded? Animation Play

Why atomic masses are not usually whole numbers? Student activity Play

Why it is useful to know the atomic masses of elements? Student activity Play

Word equations for reactions Student activity Play

Writing chemical equations using symbols and formulae Whiteboard exercise Play

Writing chemical equations using symbols and formulae Student activity Play

α decay Student activity Play

β plus radiation Whiteboard exercise Play

β+ radiation Student activity Play