Elements in group 18 of the periodic table. Least reactive elements and are gases under normal conditions; Valence electron shell is full

A horizontal row of elements in the periodic table

a vertical column of elements in the periodic table

A characteristic of a pure substance that describes its ability to change into different substances

A characteristic of a pure substance that can be observed without changing it into another substance

A reversible physical change that occurs when a substance changes from one state of matter to another.

A system in which no matter is allowed to enter or leave

the process by which one or more substances change to produce one or more different substances

A change that occurs when one or more substances change into entirely new substances with different properties.

A change in a substance that does not involve a change in the identity of the substance

A measure of how much solute can dissolve in a given solvent at a given temperature.

A material's ability to burn in the presence of oxygen

A solid that forms from a solution during a chemical reaction.

the physical forms of matter, which include solid, liquid, gas, and plasma

Law of Conservation of Mass

the law that states that mass cannot be created or destroyed in ordinary chemical and physical changes

Elements that are good conductors of heat and electric current.

An element. Does not conduct electricity; gas or dull

Elements that may accept or donate electrons readily and possess a mixture of metallic and nonmetallic properties

how likely an element is to undergo a chemical change

Inert; noble gases; valence electron shell is full

A mixture made up of a liquid and particles that (because of their large size) remain suspended rather than dissolved in that liquid.

heterogeneous mixture

A mixture that is not uniform in composition; components are not evenly distributed throughout the mixture

A mixture that is so evenly mixed that you can't see all of the different parts. Ex. Air, kool-aid

The electrons in the outermost shell (main energy level) of an atom; these are the electrons involved in forming bonds.

A region of space around the nucleus where an electron is likely to be found.

(v.) to handle or use skillfully; to manage or control for personal gain or advantage

The ability to be pulled into thin wires

The smallest particle of a substance that retains the chemical and physical properties of the substance and is composed of two or more atoms held together by chemical forces.

Atoms of the same element that have different numbers of neutrons

area around the nucleus of an atom where the atom's electrons are most likely to be found

the smallest component of an element having the chemical properties of the element

A subatomic particle that has a negative charge

A combination of two or more substances that are not chemically combined

A subatomic particle that has no charge and that is found in the nucleus of an atom

A subatomic particle that has a positive charge and that is found in the nucleus of an atom

A pure substance that cannot be broken down into other substances by chemical or physical means. Made of only one kind of atom.

A substance made up of atoms of two or more different elements joined by chemical bonds

a substance that initiates or accelerates a chemical reaction without itself being affected

A material that when combined with some other material can be turned into an insulator or a conductor.

Measure of how fast a chemical reaction occurs

A substance produced in a chemical reaction

Elements which do not occur naturally and are made in laboratories.

Chemistry Concepts Flashcards

Student preview

56 questions

Show all answers

1.

FLASHCARD QUESTION

Front

alloy

Back

a combination; a mixture of two or more metals

2.

FLASHCARD QUESTION

Front

endothermic

Back

Chemical reaction that absorbs energy

3.

FLASHCARD QUESTION

Front

exothermic

Back

A chemical reaction that releases energy

4.

FLASHCARD QUESTION

Front

malleability

Back

the ability of a substance to be hammered or beaten into thin sheets

5.

FLASHCARD QUESTION

Front

corrosion

Back

The gradual wearing away of a metal element due to a chemical reaction.

6.

FLASHCARD QUESTION

Front

alkali metals

Back

Group 1 elements that have 1 electron in outer level, very reactive, soft, silver, shiny, low density

7.

FLASHCARD QUESTION

Front

halogens

Back

Group 17 on the PTE; contains nonmetals, 7 valence electrons in its outermost energy level. Very reactive

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