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Chemistry Final Sem1

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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