Chem 1

• Know the states of matter and their characteristics. Solid, liquid, gas. • Define the Law of Conservation of Matter No Change in quantity of matter • Know the differences between physical and chemical properties with examples. Physical- melting and boiling point, color and density Chemical-ablity to undergo change • Differentiate between the following: -pure substance, can not be broken down into simpler substance by chemical change vs mixture Can be broken down into substances by chemical change Element one type of element vs compound two or more elements -homogeneous composition stays the same from point to point vs heterogenous mixture varies composition from point to point • Calculate temperature in K (kelvin) T=C^+273.15 Freezing point 273.15 Boiling point 373.15 • Know how to calculate density (Density = mass/volume) • What is an atom? Smallest property of an element What is a molecule? Two or more atoms connected by force/bonds • What is the charge of a proton (+) , electron (-) and neutron (0) ? • Where can protons, neutrons, and electrons be located? The Proton, a positively charged,subatomic particle is located in the nucleus. Protons and neutrons are in the center of the atom, making up the nucleus. Electrons surround the nucleus. • What is an isotope? Atoms of the same element that differ in mass number. A form of a chemical element in which the atoms have the same number of protons (part of the nucleus of an atom) but with a different number of neutrons (part of the nucleus of an atom). What is an isomer? Chemicals that have the same atoms but different structures • Differentiate between Chemical Formula Show what the molecule or compound is made of and Chemical Structure Show how the atoms are connected. • Differentiate between Metals, shiny & conducts heat Nonmetals, dull & poor conductors and Metalloids conduct heat & electricity & have some of the same properties as nonmetals. • What is a hydrate? Is Compound, often ionic, that contains one or more water molecules bound within its crystals. Hydrates may typically be dehydrated by heating to remove the bound water molecules, yielding the anhydrous compound. • When given an isotope, know that the superscript before the element is the mass number and the subscript is the atomic number. • Mass number (A) = number of protons + number of neutrons • Atomic number (Z) = number of protons = number of electrons • Understand how to use/read the periodic table of elements. • Know the shell number, their electron capacity. • [Do not memorize the s, p, d, f method of electron configuration]