chemistry

Question 1

chemistry

Answer 1

study of matter

Question 2

matter

Answer 2

anything that takes up space

Question 3

name three states of matter

Answer 3

solid, liquid, and gas

Question 4

element

Answer 4

matter composed of atoms that have the same number of proton charges in the nuclei

Question 5

how many elements are required in a living organism? name the 4 basic elements needed and their symbol

Answer 5

carbon- C
Nitrogen-N2
oxygen-O2
hydrogen-H+

Question 6

what are the basic untis of matter

Answer 6

atoms

Question 7

what is an atom

Answer 7

an atom is the smallest unit of an element with that elements characteristics

Question 8

what is the number of protons equal to in an atom

Answer 8

electrons

Question 9

what is the atomic number

Answer 9

number of protons

Question 10

what is the atomic mass

Answer 10

sum of protons and neutrons

Question 11

isotope

Answer 11

different form of the same atom

Question 12

difference between radioisotopes and radioactivity

Answer 12

radioisotopes- unstable isotopes(usually used to destroy cells
radioactivity- process of spontaneous breakdown(putting to much in nucleus

Question 13

half-life

Answer 13

the time taken for the radioactivity of a specified isotope to fall to half its original value (ex :Chernobyl)

Question 14

what is a chemical bond

Answer 14

electric attraction between atoms

Question 15

what does an atom do if it has an ionic bond with another atom

Answer 15

donates a electron on it outer shell (has only one electron on outer shell) to another electron that has 7 electron on their outer shell (ex: NaCl)

Question 16

what does an atom do if it has a covalent bond with another atom

Answer 16

two atoms join together and share the electrons on their outer shell (ex:O2)

Question 17

what does an atom with a hydrogen bond do with another atom

Answer 17

a hydrogen bond is a temporary bond used to break and form easily. it switches between different atoms/elements

Question 18

electrolyte

Answer 18

substance that forms ions when dissolved in water and acquires capacity to conduct electricity

Question 19

give three examples of an electrolyte

Answer 19

salt, base, acid

Question 20

name the two different ions and they’re charges

Answer 20

cation (+)

anion(-)

Question 21

movement of what give body energy

Answer 21

ions

Question 22

molecule

Answer 22

smallest physical unit of an element

Question 23

compound

Answer 23

2 or more different elements

Question 24

what is the interactions of atoms of molecules compounds to form new chemical compounds

Answer 24

chemical reaction

Question 25

what is the definition of a catalyst

Answer 25

they speed up chemical reaction

Question 26

enzymes

Answer 26

proteins that serve as catalysts

Question 27

name an example of a enzyme

Answer 27

lipids, carbohydrates, proteins

Question 28

what does pH stand for

Answer 28

power of hydration

Question 29

neutralization

Answer 29

changes in pH denature proteins

Question 30

name which number is more acidic and and give examples for each number |-------|-------|-------|-------| 0 3 7 10 14

Answer 30

0 is more acidic; 0= battery acid, 3=orange juice, 7=water, 10=baking soda, 14=drain cleaner |-------|-------|-------|-------| 0 3 7 10 14

Question 31

what is the normals range of pH in blood

Answer 31

7.35-7.45

Question 32

energy is

Answer 32

the ability to perform work

Question 33

conversion of energy is

Answer 33

forms easily converted (heat is normally made)

Question 34

ATP is....

Answer 34

energy

Question 35

mixture is

Answer 35

combination of two or more substances that can be seperated by an ordinary physical mean

Question 36

suspension

Answer 36

particles that are too large in solution that tend to settle to bottom

Question 37

colloidal suspension

Answer 37

particles remain suspended in in liquid even when shaken

Question 38

solution

Answer 38

2 parts that remain evenly distributed

Question 39

aqueous solution is what based

Answer 39

water-based

Question 40

tinctures solution is what based

Answer 40

alcohol-based

Question 41

precipitates

Answer 41

solids that are formed and fall out of a solution during chemical reactions

Question 42

if a precipitate is made in a solution can you still give that medicine? why or why not?

Answer 42

no, because it could clog their IV for example or worse, hurt your patient