Classification of Matter

Question 1

a system

Answer 1

the part of the universe being studied in a given situation

Question 2

a phase

Answer 2

any part of a system which is uniform in both its composition and properties

Question 3

Phases in a system are distinct _____ separated from each other by ______ ________.

Answer 3

regions

visible boundaries

Question 4

an element

Answer 4

substance which cannot be separated into simpler substances as a result of any chemical process

Question 5

an atom

Answer 5

smallest possible unit of an element which retains the fundamental properties of the element

Question 6

a molecule

Answer 6

a cluster of two or more atoms held together strongly by electrical forces

Question 7

an ion

Answer 7

an atom or molecule which possesses and electrical charge

Question 8

a particle

Answer 8

a general term used to describe a small bit of matter such as an atom, molecule, or ion

Question 9

homogeneous substance

Answer 9

substance consisting of only one phase

Question 10

heterogeneous substance

Answer 10

substance consisting of more than one phase

Question 11

pure substance

Answer 11

a substance that is homogeneous and has an unchangeable composition (cannot be separated, a element or compound/molecule)

Question 12

mixture

Answer 12

a system made up of two or more substances, such that relative amounts of each substance can be varied

Question 13

a mechanical mixture

Answer 13

a heterogeneous mixture of two or more substances

Question 14

true or false: all heterogeneous substances are mechanical mixtures, and vice versa

Answer 14

TRUE

Question 15

a solution

Answer 15

a homogeneous mixture of two or more substances

Question 16

a solvent

Answer 16

a component in a solution which exist in the greater quantity

Question 17

aqueous solutions

Answer 17

solutions where the solvent is water

Question 18

a solute

Answer 18

component in a solution which exist in the smaller quantity

Question 19

In a solution of 60% alcohol and 40% water, what is the solvent?

Answer 19

Water, water tends to be the solvent, even if it exist in the lesser quantity

Question 20

a compound

Answer 20

a pure substance made up of two or more types of atoms, only one type of molecule is present in the compound

Question 21

the physical properties of pure substances…

Answer 21

are unchanging and have uniform properties in solid, gas, or liquid state

Question 22

the physical properties of homogeneous mixtures…

Answer 22

are uniform and unchanging in a particular composition, but if the composition changes, a new set of uniform and unchanging physical properties result

Question 23

the physical properties of heterogeneous mixtures…

Answer 23

each have different physical properties regardless of the composition