atomic theory bitch

Question 1

whats hypothesis

Answer 1

an explanation made by observations that hasn’t been tested

Question 2

whats theory

Answer 2

an explanation that has much supported evidence and testing

Question 3

whats a law

Answer 3

a statement in science that has always been true

Question 4

who was the first person to create an idea about what an atom is

Answer 4

democritus

Question 5

what part of Dalton’s theory was proven to be incorrect

Answer 5

the indivisibility of an atom

Question 6

what did Thomson do to improve on Dalton’s theory of the atom

Answer 6

discovered the existence of particles smaller than atoms

Question 7

what did Thomson do with a cathode ray tube & what did he learn from this experiment? why did the cathode ray deflect

Answer 7

electrons were ejected into the tube and accelerated out with a voltage, he discovered that atoms have a negative charge called electrons. the electrons deflect towards positive plates and away from negative.

Question 8

which scientist discovered the nucleus

Answer 8

rutherford

Question 9

what was the gold foil experiment

Answer 9

rutherford sent a lazer through gold foil to find that atoms and particles could pass easily through and that there was much space in the atoms

Question 10

what two models is the current atomic model based off of

Answer 10

the electron cloud model & the quantum mechanic model

Question 11

what do each of these models state about the current atomic model

Answer 11

the electron cloud model shows that electrons are likely to be in specific places. the quantum mechanic model shows that electrons orbit in different ways.

Question 12

sizes of the 3 subatomic particles

Answer 12

protons and neutrons have simular size but electrons are much smaller

Question 13

describe the size and composition of the nucleus compared to the electron cloud

Answer 13

the nucleus is very small and has a lot of space in the electron cloud.

Question 14

why is an atom electrically neutral

Answer 14

atoms have an equal number of negative electrons and positive protons that cancel each other out

Question 15

whats an isotope

Answer 15

an elemental atom with a different number of neutrons

Question 16

what does the atomic number tell you

Answer 16

number of protons

Question 17

what does the atomic mass tell u

Answer 17

total number of protons and neutrons

Question 18

whats atomic mass taking an average of

Answer 18

its isotopes and natural abundance

Question 19

how do you determine the number of protons, neutrons, and electrons in an element

Answer 19

• number of electrons and protons are equal
  -neutrons = atomic number and mass subtracted from each other

Question 20

whats wavelength

Answer 20

distance between crests and a wave

Question 21

whats frequency

Answer 21

the number of vibrations that pass a spot

Question 22

how are wavelength and frequency related

Answer 22

they are inversely proportional

Question 23

whats a photon & a quantum

Answer 23

-photon is a particle of light
-quantum is a packet of substance or energy

Question 24

what is the importance of an atomic emission spectrum of an element

Answer 24

fingerprint of an atom

Question 25

waves in increasing frequency

Answer 25

radio, microwave, infared, visible light, ultraviolet, x-ray, gamma

Question 26

what color of visible light has the greatest frequency // least frequency

Answer 26

violet has the greatest frequency and red has the least

Question 27

What happens to the energy when an electron moves up an energy level? What happens to the energy when an electron moves down an energy level?

Answer 27

the electron looses energy and releases light