HUBS1403 Lecture Notes - Lecture 2: Unpaired Electron, Atomic Number, Mass Number

• School: University of Newcastle
• Department: Human Biosciences
• Course: HUBS1403
• Professor: karen mate

Document Summary

Atom: proton (+1, neutron (-1, electron (-0. 0005, atomic number: number of protons, mass number: number of protons + neutrons, atomic weight/mass: all of them. Element: made up of one type of atom (cannot be split into smaller) Isotope: same number of protons +electrons but differs in number of neutrons. Ion: an atom that gains or loses an electron. Valency: how many more electrons are needed to fill outer shell. Molecule: when two or more atoms share electrons eg. h2 (covenant) Polar = water loving hydrophilic, positive or negative charge. Non polar = doesn"t mix with water hydrophobic , no charge, electrons shared equally. Compound: two or more different elements eg. h20. Mole: quantity equal to that elements atomic weight: understand the difference between inert and reactive atoms. Reactive: incomplete outer shell: distinguish between inorganic and organic compounds. Inorganic: mostly no carbon = water, oxygen, nitrogen salt, acids essential to staying alive but not of biological origin.