GEOG 1120 Lecture Notes - Lecture 4: Mineraloid, Magnesium
Document Summary
=> elements cannot be chemically broken down into simple substances (with physical properties). => 98 natural occurring elements and some can be solid, liquid or gas. => in geography course, doesn"t need to know the periodic table. The big 8 in crust => oxygen(0), silicon(si), aluminum(al), => atomic number - number of protons in an atom. Ex: lithium => li (3 protons, 4 neutrons, 3. Ex: sodium => na (11 protons, 12 neutrons, 11. => protons and neutrons live in the nucleus; electrons in the outer shell. => rule: 2 on the 1st shell, 8 on the 2nd shell, 8 on the. => na and cl are attracted to each other (na lose its extra electrons when close to cl). This form a mineral called halite or also known as salt (cube-shaped). Ionic bonds - weak and allow minerals to split along regular planes (mineral cleavage). Covalent bonds - stronger; electrons are shared between two elements (hard minerals).
