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Science Final

Type of radiation that is described as an electron emitted from the nucleus. beta
type of radiation that has the greatest amount of penetrating power. gamma
Rutherford used this type of radiation in his experiment. alpha
The number following a chemical symbol in a formula that indicates the number of those atoms present. subscript
Particle in the nucleus of an atom with a positive charge proton
A number on the periodic table that indicates the total number of particles found in the nucleus atomic mass
The center of an atom where nearly all the mass is concentrated nucleus
Structure or particle made up of 2 or more atoms chemically bonded to form a complete unit of a substance compound
This subatomic particle is not located in the nucleus and has a negative charge electron
The number placed in front of chemical symbols and formulas used to balance a chemical equation (Tells how many atoms or molecules of each substance are involved in a reaction.) coefficient
This number on the periodic table tells us the number of protons in the nucleus of an atom atomic number
Type of radiation that has no effect on the atomic mass or atomic number gamma
Type of radiation that increases the atomic number but has no effect on the atomic mass alpha
Subatomic particle found in the nucleus that has no electrical charge neutron
The smallest particle of an element that is still that element atom
Particles with an opposite charge wil exert what force on each other? attraction
What do we call a substance that is made of two or more different elements that are chemically joined. molecule
Horizontal rows on the periodic table are called? periods
When expressing the masses of individual atoms or molecules, what units are used? amu
What do we call the various forms of the same element, each containing a different number of neutrons in the nucleus isotopes
Type of radiation that is described as a helium nucleus alpha
Type of radiation that decreases the atomic mass and atomic number beta
What general collection of elements are brittle, poor conductors of heat and electricity, and have a dull luster nonmetals
Vertical columns on the periodic table are called? families
The outermost electrons are called____electrons valence
The electron cloud is organized into seven of "these". By name they are designated as "K,L,M,N,O,P&Q." levels
An atom with a charge ion
Collection of elements that are malleable, sectile, ductile, generally good conductors of heat and electricity, and are shiny metals
A bond where electrons are shared between two atoms covalent
Type of radiation that is described as a high energy photon gamma
The type of radiation that has the least amount of penetrating power alpha
If an atom has more electrons than protons what is its overall charge? negative
This number refers to the number of electrons that an atom will lose, gain or share in the formation of a chemical bond. Includes a number and a charge sign oxidation number
What general class of elements attract electrons most strongly? ionic
A substance which cannot be broken down into simpler substances by physical methods, but can be simplified by a decomposition chemical reaction compound
An atom gains a charge by what two means? gaining an electron or losing an electron
Which general class of elements are said to be electron lenders or losers? metals
Which general class of elements are said to be electron borrowers or takers? non-metals
Non-metals tend to form what type of ions? negative
Metals tend to form what type of ions? positive
What is Avogadro's number? 6.02 X 10^23
The ability of a metal to be drawn into thin strands of wire is____? Ductile
Chemistry The science dealing with the structure and compostion of substances, the changes in composition and the ways by which these changes occur
Electron Configuration The number of electrons and their location in the electron cloud
Half-Life The time required for 1/2 of the atoms of a radioactive substance to decay
Malliable Metals ability to be hammered into flat sheets (foil)
Sectile Ability to be cut/"sectioned" with tools
Mole The metric system unit for quantities as counted
Exothermic Heat/Energy is produced/given off
Endothermic Heat/Energy is absorbed/required
Activation Energy The energy required to trigger some chemical reactions
Ionic Bond Electrons transfer from one atom to another, creating oppositely charged atoms called ions
Rule The sum of the oxidation numbers in a compound must equal zero
Polyatomic Ion A group of atoms that collectively behave as a single particle with a charge
Precipitate Insoluble solid that forms as a result of reaction that takes place in a solution
Insoluble Will not dissolve in a given solvent
Created by: Thao Co