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Ch 11/12 JAL yeahboy


Atoms All things are made up of atoms
Parts Of An Atom Nucleus (protons & neutrons)
Protons Positive charge
Neutrons Have no charge
Opposites Attract + attracts - & vice versa
Electrons Negatively charged particles on the outside of the nucleus
Number of Electrons Number of Protons
Number of Protons Determines what kind of atom it is, which is identified as a different chemical element
Element Substance that cannot be broken down into simpler substances by ordinary chemical means
Pure Substance Can’t be broken down into its parts by physical means
Element Atoms Same # of protons
Elements Found in Nature 90
Atom Smallest unit of element with properties or characteristics of said element
Molecule Group of 2+ atoms held together by very strong molecular bonds
Molecular Bonds Form between atoms that share electrons
Made of more than one atom of the same element Molecule
Compound Pure substance made of 2+ chemically combined elements
Proportions in Compounds Always stay the same
Chemical Reaction Only way to separate compounds
Chemical Formulas Identify and represent elements, molecules, and compounds
90 Amount of elements found in nature
Periodic Table of Elements Presents and organizes info about all elements
Atomic Number Amount of protons in nucleus of one atom in element
Atomic Mass Protons + electrons
Group/Family Vertical column in periodic table
Period Horizontal row in periodic table
Metals 75% of elements in periodic table. They are shiny, ductile, malleable, usually solid at room temperature, and good conductors of heat and electricity. Go from group 13-16.
Nonmetals Dull, brittle, and bad conductors of heat and energy. Spread out in Groups 14, 15, and 16; definitively in 17 and 18.
Metalloids Have characteristics of metals and nonmetals. They are semiconductors.
Chemical Property Characteristic that determines how a substance will interact with other substances during chemical reaction
Reactivity How likely an element is to react and form bonds with other elements
Ion Atom with positive OR negative charge
Inert Unable to react chemically
Alkali Metals Soft enough to be cut with a knife
Alkaline Earth Metals Very reactive, but not as reactive as alkali metals; more dense than alkali metals
Transistion Metals Groups 3-12; less reactive than alkaline earth metals; shiny, good conductors of thermal energy and electric current, higher densities and melting points than Group 1 and Group 2
Boron Group Group 13; one metalloid and four metals; reactive; solid at room temperature
Carbon Group Group 14; one nonmetal, two metalloids, and two metals; reactivity varies among the elements; solid at room temperature
Nitrogen Group Group 15; two nonmetals, two metalloids, and one metal; reactivity varies among the elements; all but nitrogen are solid at room temperature
Oxygen Group Group 16; three nonmetals, one metalloid, and one metal; reactive; all but oxygen are solid at room temperature
Halogens Group 17; very reactive; nonmetals; poor conductors of thermal energy and elecrtic current; react violently with alkali metals to form salt; never found uncombined in nature
Noble Gases Group 18; unreactive; nonmetals; colorless, odorless gases at room temperature
Hydrogen Reactive; colorless, odorless gas at room temperature; low density; reacts explosively with oxygen; has no group
Created by: PhySciLewis1