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Briana Monzon :)

Ch.11&12 Terms BM :P

QuestionAnswer
Atoms All things are made up of atoms
Parts of an atom Nucleus [Protons & neutrons]
Protons Positive charge
Neutrons No charge (Neutral)
Opposites attract + attracts – and vice versa
Electrons Negative charge
Electron cloud The area in which electrons move (makes up most of the volume of an atom)
# of protons # of electrons
# of protons in an atom What kind of atom it is
Element A substance that can’t be broken down into simpler substances by ordinary chemical means
Pure substance Matter that has the same chemical composition throughout and can’t be separated into its parts by physical means
Each of an elements atoms The same number of protons
Kinds of atoms 100
Elements found in nature 90
Atom The smallest unit of an element that has properties or characteristics of that element
Elements Different numbers of subatomic particles (Protons, Neutrons and electrons) that make up atoms
Atoms can bond by sharing or exchanging electrons
Molecule A group of two or more atoms held together by very strong chemical bonds
Molecular bonds form between atoms that share electrons
Molecule Can be made up of more than one atom of the same element
Compounds Pure substances made up of two or more different elements that are chemically joined
Elements Always found in the same proportions
The properties of a molecule or compound Can be very different from the properties of elements that form the molecule or compound
Elements, Molecules, and Compounds identified and represented by chemical formulas
Periodic table of elements presents and organizes information about all the elements
Element box Contains element’s name and it’s unique chemical symbol
Latin word for iron Ferrum
Atomic number identifies the number of protons in the nucleus of one atom of an element
Atomic Mass Given in Atomic Mass Units
Periodic table is used to show the different elements and their properties
Model A way to show an object or idea
Period Each horizontal row in the periodic table
Group Vertical column in the periodic table
Metals More than 75 percent of the elements in the periodic table are metals
Metals Located to the left of the dark, step line starting in group 13 and ending in group 16
Nonmetals Elements that are NOT metal
Nonmetals Group 17 and 18 and some of the elements in groups 14, 15, and 16
Metalloids Substances that have characteristics of both metals and nonmetals
Metalloids Groups 13, 14, 15, and 16
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 An atom that has a positive OR negative charge
Inert Unable to react chemically
Alkali Metals metals that are soft enough to cut through with a knife
Alkaline-earth metals metals that are not as reactive as alkali metals because it is more difficult for atoms to give away two electrons
Transition metals do not have individual names
Boron Group One metalloid and four metals also solid at room temperature it is reactive
Carbon group one non-metal two metalloids and two metals solid at room temperature reactivity varies
Nitrogen Group two non-metals two metalloids and one metal all but nitrogen are solid at room temperature reactivity varies
Oxygen group three non-metals one metalloid and one metal all but oxygen are solid at room temperature and they are reactive
Halogens very reactive nonmetals that are poor conductors of electric current
Nobel Gases unreactive nonmetals colorless odorless gases at room temperature
Hydrogen Reactive colorless odorless gas at room temperature low density reacts explosively with oxygen
Created by: PhySciLewis1
Popular Physical Science sets

 

 



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