BIO midterm; chem, biochem,

Question 1

Matter is..

Answer 1

Stuff of nature; mass and occupies space

Question 2

Matter is three forms

Answer 2

solid liquid gas

Question 3

matter is composed of

Answer 3

atoms

Question 4

atoms create

Answer 4

elements

Question 5

Elements organized in a chart is called:

Answer 5

the periodic table of elements

Question 6

Periodic table is a number of______ in each element are grouped by major minor and ____ elements

Answer 6

subtomic particles , trace elements

Question 7

6 MAJOR ELEMENTS

Answer 7

Oxygen
carbon
nitrogen
hydrogen
calcium
phosphorus

Question 8

6 MINOR ELEMENTS

Answer 8

Potassium
sodium
chlorine
iron
magnesium
sulfur

Question 9

Atoms are

Answer 9

subtomic particles
(protons neutrons electrons) have charge

Question 10

Mass is expressed as

Answer 10

atomic mass unit (amu) or daltons

Question 11

Proton/neutron have the mass of

Answer 11

1 amu

Question 12

Protons have a

Answer 12

postitive hage of +1

Question 13

neutrons have a

Answer 13

NO CHARGE (NEUTRAL)

Question 14

Protons and neutrons are the center of??

Answer 14

an atom the nucleus

Question 15

atoms nuclei are

Answer 15

positively charged

Question 16

electrons_____ the nucleus

Answer 16

orbit/orbitals

Question 17

number of protons is called

Answer 17

the atomic number

Question 18

P+#N=

Answer 18

atomic mass

Question 19

the number of electrons is determined by the

Answer 19

atomic number

Question 20

all atoms have

Answer 20

zero net charge

Question 21

negative charged particles =

Answer 21

the number of protons positively.

Question 22

= number of protons with a different number of neutrons are

Answer 22

isotopes

Question 23

carbon 13 and 14 are

Answer 23

a net charge

Question 24

radioactive isotopes release…..

Answer 24

radiation

Question 25

PTE Column VIIA have

Answer 25

8 electrons in valance shells. very stable!!

Question 26

Column VIIA are

Answer 26

noble gases

Question 27

Ions are

Answer 27

formed by element gaining or losing electron

Question 28

Covalent bond is formed when

Answer 28

two atoms share an election in valance shell

Question 29

chemical compounds are

Answer 29

stable associations between two or more elements

Question 30

ionic compounds are bound together by

Answer 30

ionic bonds

Question 31

ionic bonds are

Answer 31

electrostatic in nature

Question 32

ionic bonds have positive and negative charge depending on

Answer 32

GAINING an electron or loosing an electron

Question 33

Covalent bonds

Answer 33

exist between atoms that share electrons (OCTET RULE) these are molecules

Question 34

Molecular compounds

Answer 34

two or more diff element H2O

Question 35

Chemical Compounds

Answer 35

stable associations between two or more elements in the body

Question 36

chemical compounds are either

Answer 36

ionic or molecular

Question 37

ionic compounds are bound together by

Answer 37

ionic bonds

Question 38

cations

Answer 38

atoms with 1, 2, 3 valent electrons

Question 39

anions

Answer 39

atoms of 5,6,7 valent electrons

Question 40

Bonds between two or more atoms are

Answer 40

polyatomic ions HCO3 Bicarbonate

Question 41

Covalent bonds

Answer 41

exist between atoms that share an electron to create chemicals stable are molecules

Question 42

elements to form covalent bonds are

Answer 42

Hydrogen, Oxygen, Nitrogen, Carbon

Question 43

carbon can form

Answer 43

4 covalent bonds

Question 44

carbon skeleton can be

Answer 44

linear braided or ring form

Question 45

non-polar covalent is when

Answer 45

atoms share electrons equally occur between atoms

Question 46

amphipathic molecule

Answer 46

large molecure that contains both non-polar and polar patterns

Question 47

water is a

Answer 47

universal solvent salts acids bases dissolve in water polar organs dissolve in water but remain intact

Question 48

Molarity

Answer 48

number of moles per filter

Question 49

molality

Answer 49

moles per kilogram of solvent

Question 50

osmolarity

Answer 50

number of particles in 1 liter

Question 51

osmolality

Answer 51

number of particles in 1 kg of water

Question 52

Nucleic acids

Answer 52

DNA,RNA,ATP

Question 53

four classes of organ bio macromolecules:

Answer 53

variation of H and functional groups dehydration synthesis and digested through hydrolysis polymers except for lipids

Question 54

Lipids are

Answer 54

fatty non water soluble molecules (steroids)