CHE

Question 1

Are basic units of matter and the defining structure of elements

Answer 1

atom

Question 2

The term “atom” comes from the Greek word for _________

Answer 2

indivisible

Question 3

they are made up of even smaller particles which are called

Answer 3

Subatomic particle

Question 4

very small particle that is a building block for atoms

Answer 4

Subatomic particles

Question 5

3 types of subatomic particles

Answer 5

1.) Electron
2.) Proton
3.) Neutron

Question 6

Subatomic particle that possesses a positive electrical charge

Answer 6

Proton

Question 7

Subatomic particle that posses a negative electrical charge

Answer 7

Electron

Question 8

subatomic particle that has no charge associated with it that is, it is neutral

Answer 8

Neutron

Question 9

small, dense, positively charged center of an atom

Answer 9

Nucleus

Question 10

any subatomic particle found in the nucleus of an atom

Answer 10

nucleon

Question 11

-contains all the Electrons
- accounts for most of the volume of an atom the electrons move rapidly about the nucleus

Answer 11

The outer (Extranuclear) region

Question 12

number of protons in the nucleus of an atom

Answer 12

Atomic number

Question 13

sum of the number of protons and the number neutrons in the nucleus of an atom

Answer 13

mass number

Question 14

Are atoms of an element that have the same number of protons and the same number of electrons but different numbers of neutron

Answer 14

Isotopes

Question 15

is simply itss total mass and is typically expressed in atimic mass units or amu

Answer 15

Atomic mass (amu)

Question 16

• two different elements have the same atomic weight or mass number but different atomic number
• this means that the have the same number of nucleous

Answer 16

Isobar

Question 17

Different elements having the same number of neutrons

Answer 17

Isotones

Question 18

• Earliest proponent of anything resembling modern atomic theory was the ancient Greek thinker _______

Answer 18

Democritus

Question 19

proposed the existence of the indivisible atoms as a response to the arguments of PARMENIDES and the PARADOXES OF ZRNO

Answer 19

Demotricus

Question 20

• modern atomic theory
• Published hs theory in 1803

Answer 20

John dalton

Question 21

Proposed that the atom is a sphere of (+) particles to which are embedded (-) particles

Answer 21

Joseph John Thompson

Question 22

Disapproved Thompsons model using the “Gld foil/FILM experiment”

Answer 22

Ernest Rutherford

Question 23

Developed the Raisi- Bread Model or plum Pudding Model

Answer 23

Joseph John Thompson

Question 24

Developed the Planetary Model

Answer 24

Neils Bhor

Question 25

Developed the Quantum Mechanical model

Answer 25

Erwin Schrodinger