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Flashcards in Bio Chp 2 Deck (32):
0

What makes up a molecule of water?

1 oxygen atom
2 hydrogen atoms

1

What type of electrons form bonds?

Valence electrons

2

What type of ion forms when an atom loses electrons?

Positive ion

3

Why does ice float?

Because hydrogen atoms in ice are more "ordered" making ice less dense

4

What is the most abundant compound in most living things?

Water

5

What does pH measure?

The concentration of hydrogen ion

6

What numbers are acidic?
What numbers are basic?
What number(s) are neutral?

0-6
8-14
7

7

Define acid & basic?

Acid releases hydrogen ions.
Base absorbs hydrogen ions.

8

Name the 3 particles that make up an atom.

Proton, neutron, & electron.

9

What is the nucleus made of?

Protons & neutrons.

10

What makes water molecules polar? (What end is positive? What end is negative?)

Oxygen & hydrogen atoms.

11

In chemical reactions, atoms are..

The reactants(stays the same).

12

Name the 4 groups of organic compounds.

Carbohydrates, Lipids, Proteins, & Nucleic Acids.

13

Proteins are polymers formed by what?

Amino Acid

14

What is the molecular form of glucose?

C-6
H-12
O-6

15

Ionic vs. Covalent Bonds

Ionic: shares electrons; non-metal
Covalent: looses electrons; metal

16

Adhesion, Cohesion, Capillary Action

Capillary Action only occurs when the adhesive forces are stronger than the cohesive forces

17

Proteins are polymers formed by what?

Amino Acids

18

What is the purpose of nucleic acids?

Make proteins; gives energy

19

What are 2 types of nucleic acids?

DNA & RNA
DNA= stores proteins
RNA= makes proteins

20

Define solvent

Liquid is dissolved to form a solution

21

Define Monosaccharide

simple sugars, easily broken down

22

Define Product

Made by a chemical reaction;
comes out of a chemical reaction

23

Define Covalent Bond

Forms when atoms share a pair of electrons

24

Define Carbohydrates

Made of carbohydrogen & oxygen

25

Define Chemical Reaction

Change/ Formation in any substance by breaking & forming chemical bonds

26

Define Activation Energy

amount of energy needed to absorb & start a chemical reaction

27

Define Catalyst

Substance that speeds up chemical reactions
Decrease activation energy;
Increase reaction rate

28

Define Mixture

material composed of 2 or more elements/compounds get mixed together

29

Define Solution

A mixture in which 1 or more substances are uniformly dissolved in other substance
A homogeneous(made of same parts) mixture

30

Define Reactants

What goes into a reaction
What reacts

31

Define Enzymes

Catalysts for chemical reactions in living things