Chapter 2

Question 1

ELEMENTS

Answer 1

A SUBSTANCE THAT CANNOT BE BROKEN DOWN INTO SIMPLER SUBSTANCES BY CHEMICAL MEANS

Question 2

ATOMS

Answer 2

THE SMALLEST PART OF AN ELEMENT THAT DISPLAYS THE PROPERTIES OF THE ELEMENT

Question 3

ATOMIC SYMBOL

Answer 3

ONE OR TWO LETTERS THAT STAND FOR THE NAME OF THE ELEMENT

Question 4

PROTONS

Answer 4

POSITIVE

Question 5

NEUTRONS

Answer 5

NEUTRAL

Question 6

ELECTRONS

Answer 6

NEGETATIVE

Question 7

ELECTRON SHELLS

Answer 7

USED TO INDICATE THE AVERAGE LOCATION OF THE ELECTRONS

Question 8

ATOMIC NUMBER

Answer 8

THE AMOUNT OF PROTONS AND NEUTRONS

Question 9

MASS NUMBER

Answer 9

THE SUM OF THE PROTONS AND NEUTRONS IN NUCLEUS

Question 10

ATOMIC MASS

Answer 10

THE AVERAGE MASS FOR ALL THE ISOTOPES OF THAT ATOM

Question 11

molecule

Answer 11

exists when two or more of the same type of atoms bond together, smallest part of a compound that retains its chemical properties

Question 12

compound

Answer 12

a molecule containing atoms of at least two different elements

Question 13

formula

Answer 13

tells you the number of each kind of atom in a molecule

Question 14

ionic bonding

Answer 14

an electron transfer that results in both atoms having eight electrons in their outer shells

Question 15

ions

Answer 15

charged particles

Question 16

ionic bond

Answer 16

when ionic compounds are held together by an attraction between negatively and positively charged ions

Question 17

covalent bond

Answer 17

when two atoms share electrons in such a way that each atom has an octet of electrons in the outer shell

Question 18

nonpolar covalent bond

Answer 18

when the sharing electrons between two atoms is equal

Question 19

electronegativity

Answer 19

the atom that has a greater attraction for a shared pair of electrons has a greater electronegativity

Question 20

polar covalent bond

Answer 20

when electrons are not shared equally

Question 21

calorie

Answer 21

the amount of heat energy needed to raise the temp of 1 g of water 1 deg C

Question 22

solution

Answer 22

contains dissolved substances

Question 23

solutes

Answer 23

the dissolved subtances

Question 24

cohesion

Answer 24

the abilityy off water molecules to cling to other water molecules

Question 25

adhesion

Answer 25

the ability of water molecules to cling to other polar substances

Question 26

surface tension

Answer 26

the stronger the force between molecules in a liquid, the greater the surface tension