Why can samples of an element have same atomic number but different atomic masses?
This is because the atomic mass of an element is the sum of protons and neutrons. While the proton number is specific for an element, the neutron number can vary for different isotopes of the element. Therefore an element with a higher number of neutrons will have a higher atomic mass number.
FB
Related Chemistry GCSE answers
All answers ▸Explain which species is oxidised in this reaction: Br2 +2I– 2Br– +I2.
Explain what would happen to the pH of a solution of aqueous hydrochloric acid if you add water.
An equilibrium between hydrogen and nitrogen to make ammonia. Explain what would happen to the amount of product if a) pressure was increased b) temperature was increased c) a catalyst was added. Energy change -92KJ/mol
Experiment results show that butane has a higher boiling point than propane, explain why.