BIOL 1201 : EXAM 1
Document Summary
What do scientists do: make observations, attempt to discern patterns, assume future is like the past. Theory: tested hypothesis many times and supported it. Law: tested theory many times and supported it. Difference between those chemicals and you: how they"re organized. Polar dissolve in polar solvents, nonpolar in nonpolar. Smallest unit of matter separable by normal chemical means. Smallest unit of matter that retains all of the properties of that element. Composed of many smaller particles: particle mass electric charge, proton, neutron, electron. Atomic number: the number of protons in an atoms. Atomic mass: the number protons and neutrons in an atom (approximately) Isotopes: variants of an atom, having a different atomic mass (neutrons) Atomic structure: bohr model: this model has electrons moving in orbitals or shells around the nucleus. The number of electrons to be gained or lost is called the valence. # of electrons that need to be gained or lost to fill the outer shell of electrons.
