Explain the meaning of the quotation at the beginning of this chapter: Get the right data. Get the data right. Keep the data right.
Chem Notes Week 2 Chapter 2: Atoms Molecules and Ions Daltons Atomic Theory (1808) Elements are composed of extremely small particles called atoms All atoms of a given element are identical Atoms combine in simple whole number ratios to form compounds o Law of definite Proportions Different samples of the same compound always contains the same portions of elements o Law of multiple proportions elements can combine in different ways Chemical reactions Chemical reaction is only separation, combination, or rearrangement of atom o Law of conservation of Mass matter can be created nor destroyed Subatomic Particle Nucleus contains protons and neutrons Energy rings surrounding nucleus with electrons Charge
