Lesson 2 "The Riot and the Dance"

Question 1

a substance that cannot be broken down into simpler substances by normal chemical means

Answer 1

element

Question 2

the smallest unit of an element

Answer 2

atom

Question 3

two or more atoms bonded together is a

Answer 3

molecule

Question 4

a molecule containing two or more elements is a

Answer 4

compound

Question 5

the two subatomic particles contained in the nucleus of an atom are

Answer 5

protons and neutrons

Question 6

the subatomic particles contained in the shells orbiting the nucleus

Answer 6

electrons

Question 7

Atomic number is the number of

Answer 7

protons

Question 8

Atomic weight or mass is the sum of

Answer 8

protons and neutrons

Question 9

A complete transfer of electrons from one atom to another

Answer 9

ionic bond

Question 10

when atoms are joined together because they are sharing electrons

Answer 10

covalent bond

Question 11

in a polar covalent bond how are the electrons being distributed in the molecule?

Answer 11

unevenly

Question 12

in a non-polar covalent bond how are the electrons being distributed in the molecule?

Answer 12

evenly

Question 13

weak attractions between partially positive charged atoms and partially negative charged atoms within the same molecule or between different molecules are called

Answer 13

hydrogen bonds

Question 14

water’s cohesive property is due to its ability to ________ bond with itself

Answer 14

hydrogen

Question 15

the pH scale is a measure of a substance’s _______ ion concentration

Answer 15

negative

Question 16

A pH of 7 is termed_______ Below pH7 is considered ______ and above 7 is considered _______

Answer 16

normal; acidic; alkaline

Question 17

Substances that resist changes in pH are called _____

Answer 17

buffers