chemistry mod 4

Question 1

one fascinating area of study of atoms

Answer 1

isotopes

Question 2

the term isotope was first used by

Answer 2

Scottish doctor Margaret Todd

Question 3

renowned chemist _ believed to have taken the first steps in isolating the isotope by degenerating uranium

Answer 3

F. Soddy, in 1913

Question 4

in 1931 _ discovered the effect of isotopes on the mass of an atom

Answer 4

Harold Urey and G.M. Murphy

Question 5

the term isotope is a combination of the greek word _

Answer 5

isos and topos

Question 6

which means equal

Answer 6

Isos

Question 7

the word for place

Answer 7

Topos

Question 8

best known use of isotope is in _

Answer 8

nuclear weapons and energy

Question 9

in medicine, isotopes are used in?

Answer 9

photosynthesis

Question 10

archeologists use _ to determine the age of an object, a process known as _

Answer 10

carbon isotopes, carbon 14 dating

Question 11

the discovery of the isotope showed that _

Answer 11

no two chemicals can be the same

Question 12

are atoms of the same element that have the same number of protons but different in the number of neutrons

Answer 12

isotopes

Question 13

an unstable atom is an atom whose nucleus can change its composition

Answer 13

radioisotope

Question 14

are radioactive isotope because they produce radiations they breakdown in the process

Answer 14

radioisotopes

Question 15

have a stable proton-neuron combination and do not display any sign of decay

Answer 15

stable isotopes

Question 16

scientists performing environmental ad ecological experimenents use stable isotopes of _

Answer 16

oxygen, hydrogen, sulfur, nitrogen, and carbon

Question 17

have an unstable combination of protons and neurons. isotopes decay

Answer 17

radioactive isotopes

Question 18

come from human made nuclear activities, such as weapons teasting and nuclear fuel production

Answer 18

anthropogenic isotopes

Question 19

are the end result of radioactive decay

Answer 19

radiogenic isotopes

Question 20

radioactive isotopes find uses in _

Answer 20

agriculture, food industry, pest control, archeology and medicine

Question 21

which measures the age of carbon bearing items uses a radioactive isotope known as carbon 14

Answer 21

radiocarbon dating

Question 22

in medicine, _ emitted by radioactive elements are used to detect tumors inside the human body

Answer 22

gamma rays

Question 23

the process of exposing food to a controlled level of gamma rays- kills many types of bacteria, making food safer to eat

Answer 23

food irradiation

Question 24

all elements are _

Answer 24

isotopes

Question 25

are positively charged particles in an atoms nucleus

Answer 25

protons

Question 26

carries a neutral charge, so each positively charged proton is balanced by a negatively charged particle

Answer 26

atom

Question 27

negative particles _ orbit outside of the nucleus

Answer 27

electrons

Question 28

determines how an atom will react and bond to other atoms, giving each element its specific chemical and physical characteristics

Answer 28

the orbital configuration of the electrons

Question 29

subatomic particles that carry no charge so the number of neutrons in an atoms nucleus does not affect the number of electrons of their orbital configuration

Answer 29

neutrons

Question 30

gives an elements average atomic weight beneath the elements chemical symbol

Answer 30

periodic table

Question 31

when two atoms of the same element have different numbers of neutrons

Answer 31

isotopes