It is a subscript representing atoms in a molecule. In this example Hydrogen is diatomic, which means it naturally forms in pairs. So it is 2 atoms of hydrogen.
Chat with our AI personalities
On a number line does 2 or - 2 represent the absolute value of -2?
Fund code
Use set builder notation to represent the following set.{... -3, -2, -1, 0}
This is converting fractions into equivalent fractions, which is achieved by multiplying (or dividing) the numerator (top number) and denominator (bottom number) by the same number. eg 2/6 → (2×2)/(6×2) = 4/12 eg 2/6 → (2×3)/(6×3) = 6/18 eg 2/6 → (2÷2)/(6÷2) = 1/3 Thus 2/6, 4/12, 6/18, 1/3 all represent the same value.
An irrational number can not be expressed as a fraction as for example the square root of 2