Unit 2 Honors Chem Vocab

Question 1

study of structure and properties of matter as well as changes it undergoes

Answer 1

Chemistry

Question 2

basic building blocks of matter

Answer 2

atoms

Question 3

definite composition and contains ONLY one type of matter present. Has set of properties that are always same, regardless of source

Answer 3

pure substance

Question 3

anything that has volume and mass

Answer 3

Matter

Question 4

pure substances that contain only 1 type of atom

Answer 4

elements

Question 5

pure substances that contain more than 1 type of element chemically bonded together

Answer 5

compounds

Question 5

neutral groups of atoms held together by chemical bonds

Answer 5

molecule

Question 6

different forms of an element

Answer 6

allotropes

Question 7

shows arrangement of atoms in a molecule

Answer 7

structural

Question 7

compounds will always have the same elements in exactly the same ratio by mass

Answer 7

law of definite proportions

Question 8

shows # and type of bonded atoms

Answer 8

molecular

Question 9

describe how many atoms of each type are in a compound, or how many atoms are in a molecule

Answer 9

subscripts

Question 10

describe # of molecules that are present or tells you how many molecules are involved

Answer 10

coefficients

Question 11

material that contains 2 or more types of atoms/mol. that are NOT chemically bonded

Answer 11

mixture

Question 12

contains compounds that aren’t mixed evenly in microscopic level so different compounds have different properties

Answer 12

heterogeneous mixture

Question 13

solutions evenly mixed on microscopic level so all parts of sample have same properties

Answer 13

homogeneous mixture

Question 14

can be observed without changing the composition of matter

Answer 14

physical property

Question 14

those can be observed without creating new substance

Answer 14

physical properties

Question 15

2 or more pure substances physically combined

Answer 15

mixtures

Question 15

those can only be observed by chemically changing 1 substance into another substance (with new molecular formula)

Answer 15

chemical properties

Question 16

can be observed only when chemical change occurs

Answer 16

chemical properties

Question 17

ability to hammer matter into thin sheet

Answer 17

malleability

Question 18

separation based on density

Answer 18

centrifuge

Question 19

separation based on attraction between substances

Answer 19

chromotography

Question 19

pour off a liquid

Answer 19

decant

Question 19

separation based on boiling point

Answer 19

evaporation or distillation

Question 20

a change in matter without changing composition

Answer 20

physical change

Question 21

change in composition of matter occurs (new)

Answer 21

chemical change

Question 22

energy is absorbed (brrr)

Answer 22

endothermic

Question 22

reactants —-> products

Answer 22

chemical reaction

Question 23

energy is given off (ooo)

Answer 23

exothermic

Question 24

how much energy is needed to raise 1 gram of matter 1 degrees C

Answer 24

specific heat / capacity