Chem 4 Vocab

Question 1

Atom

Answer 1

Smallest particle of an element that remains the properties of the element

Question 2

Ray

Answer 2

A beam, high voltage of 2 electrodes

Question 3

Cathode

Answer 3

Negative (anode is plus)

Question 4

Cathode ray

Answer 4

Ray of radiation traveling from the cathode to the anode
By jj

Question 5

Electron

Answer 5

Outside of atom, when ray hit electrons were dislodged
9.11 x 10 -28 g

Question 6

Nucleus

Answer 6

Positively charged mass in center of atom

Question 7

Subatomic

Answer 7

Stuff within the atom

Question 8

Neutron

Answer 8

No charge,
Mass of 1.675 x 10 -24g

Question 9

Atomic number

Answer 9

Number of PROTONS in a nucleus

Question 10

Isotopes

Answer 10

Atoms with same number of PROTONS but different number of NEUTRONS

Question 11

Protium

Answer 11

Hydrogens that may have 0 neutrons

Question 12

Mass number

Answer 12

Sum of PROTONS and NEUTRONS

Question 13

Isotope notation

Answer 13

Elements name followed by hyphen then its mass number

Zinc-64

Question 14

Symbolic notation

Answer 14

Elements showing

Mass number 64
Z
atomic number 30

Question 15

Number of neutrons equal

Answer 15

Mass number - atomic number

Question 16

Atomic mass units

Answer 16

Equal to the mass of 1/12 the mass of carbon-12 atom

Question 17

Nuclear reactions

Answer 17

Reactions that involve a change in the atoms nucleus

Question 18

Radioactivity

Answer 18

Substances spontaneously emitting radiation

Question 19

Radiation

Answer 19

Rays and particles emitted by radioactive material

Question 20

Spontaneous

Answer 20

One that occurs immediately

Question 21

Radioactive decay

Answer 21

Unstable nuclei lose energy by emitting radiation

Question 22

Alpha radiation , a-radiation

Answer 22

Alpha particles ejected from nucleus

Question 23

Nuclear equation

Answer 23

Type of equation that shows the atomic number and mass number involved

Question 24

Beta radiation ,

Answer 24

Fast moving high energy electrons

Question 25

Gamma radiation

Answer 25

High energy radiation that has no mass