Chap 2 -2 Flashcards Preview

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Flashcards in Chap 2 -2 Deck (20):
1

What are electron mixture/solutions?

atoms w/in substances intermingle but don't bond

2

What are covalent bonds?

atoms share a pair(s) of electrons to fill outermost shell

3

What is the most stable bond?

Covalent<

4

Non polar bonds have?

equal sharing

5

Polar bonds have?

unequal sharing

6

What are there polar bonds?

electronegativity= certain types of atoms have greater pull on nucleus than other atoms

7

Covalent bonds have what shape?

molecular due to bond angles/geometry

8

What happens in ionic bonds?

atoms transfer electrons which changes proton electron ratios
- atoms become charged ions

9

What happens in hydrogen bonds?

attractive force between polar molecules
results in weak bonds

10

Water is __ % of your body weight

66

11

What are water's properties?

olarity
temperature stabilization
cohesion
good solvent

12

Water is a ?

polar covalent molecule

13

What is evaporative cooling?

H- bonds break releasing water molecules

14

How is water a good solvent?

dissociates ions and polar molecules (puts them into solution/mixture)

Forms hydration spheres/shells

15

Hydrophobic substances are?

nonpolar and repel water

16

Life is maintained at a pH of ?

7.4

17

What is the Buffer System?

a set of compounds act as weak acid/base combo to keep pH stable
- one donates ions the other accepts them

18

What is acidosis?

Too many hydrogen ions/blood is declining

19

What is alkalosis?

pH becoming more basic

20

What is Cohesion?

like molecules stick together
life sustaining property
creates surface tension