Atoms and Molecules

Question 1

Contain one kind of atom

Answer 1

Elements

Question 2

Positive charge

Answer 2

Protons

Question 3

Negative charge

Answer 3

Electrons

Question 4

Neutral charge

Answer 4

Neutral

Question 5

Number of protons in the nucleus

Answer 5

Atomic number

Question 6

Center; made of protons & neutrons

Answer 6

Nucleus

Question 7

Distance of electrons from nucleus

Answer 7

Shell

Question 8

Abbreviations for the names of elements

Answer 8

Chemical symbols

Question 9

Atoms share electrons

Answer 9

Covalent bond

Question 10

Positive and negative ions attract each other

Answer 10

Ionic bond

Question 11

An atom that has gained or lost electrons

Answer 11

Ion

Question 12

Have a sour taste; ex: lemon juice, vinegar, & HCI

Answer 12

Acid

Question 13

Taste bitter and feel slippery; ex: soap, toothpaste, & baking soda

Answer 13

Base

Question 14

The scale used to determine the concentration, or amount, of an acid or base in a solution

Answer 14

pH scale

Question 15

Acids measure from…

Answer 15

0 to 6.9

Question 16

Bases measure from…

Answer 16

7.1 to 14

Question 17

Solutions with a pH of | | are considered neutral

Answer 17

7.0

Question 18

What has pH of 7.0?

Answer 18

Pure H20