AS CHEMISTRY 9701 Exam Questions and answers Graded A+
AS CHEMISTRY 9701 Exam Questions and answers Graded A+ Define: atomic number. - ☑ ☑ The atomic (proton number) is the number of protons in the nucleus. Define: mass number. - ☑ ☑ The mass (nucleon) number is the total number of protons and neutrons. Define: First lonisation energy. - ☑ ☑ The first ionisation energy is the energy needed to remove one mole of electrons from one mole of gaseous atoms to form onene mole of ions wi
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as chemistry 9701 exam questions and answers grade