University:
University of Cambridge
Course:
0620 IGCSE | Chemistry
Academic year:

2022
Views:

150

Pages:

2
Author:

Aku S

Chapter 1(1.8); description of an atom Structure of an atom: -cloud (electron) -nucleus(Protons and neutrons) - about 1.10°m or 0.1 nm Subatomic particles: Proton-pt mass of 1.6731-10t7 kg 1 amu neutron-nmass of 1.675.10tkg-lanου electron-et -31 → mass of 9.11.10 kg50.000 env negative Charge de = qpt the nucleus contains aa% of the mass Of an atom Strong force holds pt and n° together #pt Solely determains the element type #pt is the "atomic number of a nucleus" Z=#p⁺ A=mass - mass # = sum of total protons + neutrons elemental Symbol: A Z=pt Z total charge sum of all Charges in atom isotopes: same element different masses natural abundance: factors isotopes in nature average assi ighted average of all isotopes