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Ch 11 and 12 Terms

BY Iakobos(Jacob Ledbetter)

Atoms All things are made up of atoms
Parts of an Atom Nucleus (protons & neutrons)
Protons Positive charge
Neutrons No charge
Opposites Attracted + attracts and vice versa
Electrons Negatively charged particles outside of the nucleus
Number of Electrons Number of Protons
Number of Protons Determines what kind of atom it is, which are identified as a different chemical element
Element Substance that cannot be broken down into simpler substances by ordinary chemical means
Pure Substance Matter that cannot be separated into its parts by physical means
Each Elements Atoms Have the same number of protons
Smallest Unit of an Element Atom
90 About the amount of elements found in nature
Molecule Group of two or more atoms held together by strong chemical bonds
Compounds Pure substances made up of two or more elements
Periodic Table of Elements Chart that organizes and presents information about all the elements
Atomic Number Identifies number of protons in the nucleus of one atom of an element
Atomic Mass The Number of protons and neutrons in one atom of an element combined
Model Can be a diagram, 3d representation, map, programs, or math equation
Period Each horizontal row in the periodic table. These are numbered from one to seven
Group/Family Each vertical column in the periodic table. These are numbered from one to eighteen
Metals Elements to the left of the step-like figure. They are shiny, malleable, ductile and usually solid at room temperature. They are good conductors of heat and electricity
Non-Metals Elements that aren’t metals. They are located above or to the right of the step-like figure. They are dull, brittle, and poor conductors of heat and electricity
Metalloids Have characteristics of metals and non-metals
Chemical property a characteristic that determines how a substance will interact with other substances during a chemical reaction
Reactivity describes how likely an element is to react and form bonds with other elements
Ion atom that has a positive or negative charge
Inert unable to react chemically
Alkali Metals Metals that are the most reactive, have a low density, and can be cut with a knife fall into this group
Alkaline-earth metals Not as reactive as Alkali metals, but still very reactive. Silver in color and are denser than Alkali
Transition Metals Includes groups 3-12 on periodic table, shiny, good conductors of thermal energy, higher densities and melting points than groups 1-2, except mercury
Boron Group Reactive, solid at room temperature
Carbon Group varied reactivity, solid at room temperature
Nitrogen Group varied reactivity, all but nitrogen are solid at room temperature
Oxygen Group reactive, all but oxygen are solid at room temperature
Halogens Very reactive, poor conductors of electricity, react violently with alkali to form salts, never found uncombined in nature
Noble Gases unreactive, colorless, odorless gases at room temperature
Hydrogen reactive, colorless, odorless gas at room temperature; reacts explosively with oxygen
Created by: PhySciLewis1