QUiz one

Question 1

What is an isotope

Answer 1

an isotope is an element that has same number of protons as another atom of the same element but are different in the amount of neutrons, thus different masses

Question 2

Name the chemical properties in isotopes

Answer 2

valence electrons are the same

Question 3

Name 3 Uses for radioactive isotopes and the isotopes involved in the process

Answer 3

Smoke alarms - Americium 241, produces non lethal amounts of radiation to help aid detection of smoke through the electric current

Nuclear energy
splitting of uranium-235 causes extreme release of energy leading to nuclear bombs.

Studies of Global Warming- they compare the ratio between O-16 and O-18 and 0-16 evaporates faster cuz lighter so if there is less 0-16 then the temp is warmer.

Question 4

how much of the electric spectrum is visible?

Answer 4

only a tiny amount!

Question 5

The colors present in the emission spectrum are the same as those that are missing from the absorption spectra, true or false?

Answer 5

true

Question 6

What form of energy does an electron give out when it falls from its excited state

Answer 6

electromagnetic radiation

Question 7

What form of energy does an electron give out when it falls from its excited state

Answer 7

electromagnetic radiation/ !photon is released!

Question 8

photons of ultraviolet rays have more energy than photons of infrared light, true or false?

Answer 8

true

Question 9

the energy of the photon light emitted is equal to what?

Answer 9

energy change in atom

Question 10

how does the emission spectra prove the energy levels are quantized

Answer 10

Because as the electron transfers from one energy level to another it released energy, similar to a stair case you cannot step in between energy levels and therefore each level of energy has its own discrete orbit ring. the released energy is shown on the electron spectrum as singular lines proving the discrete levels.

Question 11

why do the outer lines of an atom converge?

Answer 11

because the energy levels inside the atom are closer together at higher energy.

Question 12

emission spectrum series rate weak to large amount of energy

Answer 12

LYMAN - big energy (ultraviolet)
BALMAN - Meduim energy (visible light)
PASCHEN- weak (infrared)

Question 13

emission spectras applications in qualitive analysis

Answer 13

analyzing stars
solving crimes
testing gems

Question 14

qualitive vs quantative

Answer 14

qualitative analysis in chemistry gives the presence or absence of different chemical components in a sample whereas

quantitative analysis in chemistry gives the amount of different chemical components present in a given sample

Question 15

physical properties

Answer 15

mass - number of neutrons