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Chemistry Final Sem1
| Question | Answer |
|---|---|
| Matter | Anything that has mass and takes up space Examples: water vapor, air, food |
| Non-matter | Things that no mass or don't full any volume Examples: heat, time, gravity |
| Physical properties of matter | Mass, color, melting point, odor, appearance, texture, and volume |
| Chemical properties of matter | oxidation state, heat of combustion, reactivity with other chemicals and decomposion |
| Celcius to Kelvin | K = C° + 273.15 |
| Kelvin to Celcius | K° - 273.15 = C |
| Kelvin | Freezes at 273.15° and Boils at 373.15° |
| Celsius | Freezes at 0° and Boils at 100° |
| Atomic Number | Number of protons, number is in the top left corner |
| Periods | Rows from left to right |
| Groups / Families | Columns from top to bottom |
| Particles in an atom | Protons and neutrons make the nucleus and electrons orbit around them |
| Know how to read elements on the periodic table | |
| Know what categories elements are in | |
| Halogens | Column 17 |
| Neutral Atoms | Have the same number of protons and electrons |
| Number of neutrons equation | mass number - protons |
| Valance electrons | electrons that are in the outermost energy level |
| Ions | a charged particle; cation or anion 1-4 loose ions 5-7 gain ions |
| Mass Number | number of protons an neutrons in an atom, tell the mass of the atom in amu |
| Atomic Mass | aka average atomic weight, average mass of all the isotopes |
| Isotopes | same element with different number of neutrons |
| Atomic Mass equation | protons + nutrons |
| What happens when an electron goes down an energy level | its energy has decreased |
| Atomic radius trend | large atomic starts in the bottom left and decreases towards the upper right |
| What happens to metals in groups 1a, 2a, and 3a when they form ions | they lose electrons |
| A salt | compound held together by ionic bonds |
| Characteristics of ionic bonds | solids, when melted they conduct electricity, composed of metallic and nonmetallic elements |
| Covalent bonds | a bond framed between nonmetal and nonmetal atoms |
| non metals are poor conductors of electricity | |
| Octet rule | States that, in chemical compounds. atoms tend to have the electron configuration of a noble gas |
| Lewis dot structures | show the number of valence electrons |
| Properties that determine the physical behavior of gas | the amount of gas pressure of the gas temperature of the gas |
| Two most abundant elements created in the Big Bang | Helium and hydrogen |
| Cation | positively charged ion |
| Anion | Negatively charged ion |
| identify the most reactivating non-metal | |
| Most involved in chemical bonding | valance electrons |
| Electronegativity | Decreases from the top left to the bottom right |
Created by:
luke_mladenoff
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