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Flashcards in Ch 2 Test Deck (51):
1

which of the following would have a negative charge

an electron

2

atoms that are of the same element but contain different numbers of neutrons are called _

isotopes

3

the atomic number of an atom is determined by the _

number of protons

4

an _ contains atoms with the same atomic number

element

5

the area around the center of an atom, which contains negatively subatomic particles, is called the electron _

cloud

6

the unchanged subatomic particles are called _

neutrons

7

which of the following elements is found in all organic compounds

carbon

8

atoms of the same element have the same number of _ but may have different numbers of _

protons, neutrons

9

the mass number represents the number of _

neutrons and electrons

10

how many electrons do most atoms need in their second outer shell i order to be stable

8

11

which is a correct description of a molecular molecule

it is comprised of 2 or more atoms sharing electrons

12

combinations of atoms that contain 2 or more different elements are called _

compounds

13

covalent bonds are formed when _

atoms share electrons

14

when an anion and a cation are electrically attracted to each other, _ is formed

an ionic bond

15

ions with a positive charge are called _

cations

16

which is an example of an anion

chloride

17

which of the following is a weak electrical attraction between molecules

hydrogen bond

18

if 2 pairs of electrons are shared between 2 atoms, what type of bond occurs

double covalent bond

19

chlorine atoms have 7 electrons in the outermost shell. as a result, one would expect chlorine to form ions with a charge of

1-

20

the term that applies to all of the decomposition reactions that occur in metabolism is _

catabolism

21

reactions that ultimately result in larger molecules formed from smaller sones are called _

synthesis

22

which statement about the reaction, H2+Cl2 yields 2HCl is correct

HCl is the product

23

hydrolysis is an example of which type of reaction

decomposition

24

choose the most accurate definition of chemical reaction

it is a process in which bonds beteen atoms are formed or broken

25

the reaction N2+3H2 yields 2NH3 would be an example of a _ reaction

synthesis

26

AB yields A + B is to decomposition as A + B yields(both ways) AB is to _

reversible

27

chemical reactions that occur in the human boy are catalyzed by special protein molecules called _

enzymes

28

the addition of energy to start a reaction is called the energy of _

activation

29

chemical reactions that release energy are categorized as

exergonic

30

in an endergonic reaction _

energy is required for the reaction to occur

31

which is the mechanism of enzyme functioning

enzymes lower the activation energy

32

what is the primary composition of organic molecules

carbon an hydrogen

33

which of the following pairs of elements can be classified as inorganic only

sodium and calcium

34

which of the following is inorganic

sodium

35

which of the following constitutes most of the body weight and is essential for most metabolic reactions

water

36

a solution containing more hydrogen ions than hydroxide ions is

acidic

37

the most acidic solution would have a pH of _

0

38

which of the following substances would be nearest the pH of human blood

pure water-pH 7

39

why is it important to precisely regulate the pH of blood and other bodily fluids

hydrogen ons are extremely reactive

40

a substance that either removes or replaces hydrogen ions is called _

buffer

41

which of the following are defined as soluble inorganic compounds whose ions conduct electric current

electrolytes

42

which of the following is an example of a strong base

NaOH

43

functionally carbohydrates are most important as _

source of energy

44

the most important metabolic compound that fuels the body is _

glucose

45

which of the following is an example of a disaccharide

sucrose

46

lipids are used for which of the following

to form essential components of a cell

47

substrate molecules bind to enzymes at the _

active site

48

proteins are composed of tiny units called _

amino acids

49

which of the following is unique to RNA

ribose

50

what is the most important high energy compound found i the body

ATP

51

what does a nucleotide found in DNA consist of

phosphate group, nitrogenous base, sugar