chemisry

Question 1

elements in body

Answer 1

1. oxygen
2. hydrogen
3. nitrogen
4. calcium
5. carbon
6. all others

Question 2

atoms

Answer 2

smallest part of an element that still acts like that element

Question 3

three particle atoms are composed of

Answer 3

1. protons
2. neutrons
3. electron

Question 4

protons

Answer 4

positive

Question 5

neutrons

Answer 5

neutral

Question 6

electrons

Answer 6

negative

moves around an atom and they are unstable

Question 7

ions

Answer 7

atoms that have a charge

Question 8

electrolytes

Answer 8

substances that release ions in water (Gatorade)

Question 9

cation

Answer 9

positive charge

Question 10

anion

Answer 10

negative charge

Question 11

ph

Answer 11

measures the hydrogen (H+)

Question 12

acidity / alkalintiy

Answer 12

measured by PH

Question 13

formula for PH measurement

Answer 13

PH= - LOG [H+]

if H= goes up then PH goes down

Question 14

-LOG = how many more times acidic or basic

Answer 14

10x

Question 15

below 7 =

Answer 15

Acidic

Question 16

above 7 =

Answer 16

basic ; alkalinity

Question 17

interaction of molecules

Answer 17

• change in energy
• rearranging form for increased stability
• it is associated with ions because ions are unstable

Question 18

ionic bond

Answer 18

attraction of ions to each other due to opposite changes

- strong -

Question 19

Covalent bond

Answer 19

formed when two atoms SHARE a pair of elecrons

Question 20

Octet Rule

Answer 20

• takes two electrons to fit inner orbit

- to be stables you need 8 electrons to be in outtershell

Question 21

polar

Answer 21

molecules that has parts that are more positive in a region and also have parts that are more negative in a region

Question 22

Hydrogen Bond

Answer 22

inter molecular FORCE between polar molecules
-weak bond-
its structure and its stability is important for several biomolecules