Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chemistry U1 Atoms
The basic information of an atom
| Question | Answer |
|---|---|
| What is atomic number? | the number of protons that distinguishes elements from each other |
| What are the three subatomic particles? | protons, neutrons, and electrons |
| What is the protons mass and charge? | The positively-charged particle that contributes to the mass of an atom - located in the nucleus |
| What is the nuetrons mass and charge? | The subatomic particle with no charge but contributes to the mass of the nucleus |
| What is the electrons mass and charge? | Subatomic particle considered to not have mass but carries a negative electrical charge - found outside of the nucleus |
| How to determine the number of protons from an atom ion symbol | at the bottom lift cornor |
| How to determine the number of nuetrons from an atom ion symbol | proton - mass number |
| How to determine the number of electrons from an atom ion symbol | same as proton |
| How does an atom model look like? | The Bohr model shows the atom as a central nucleus containing protons and neutrons with the electrons in circular orbitals at specific distances from the nucleus |
| What is isotope? | Term for atoms with similar protons but differing numbers of neutrons |
| determine if two atoms are isotopes of each other based on protons and neutrons | Atoms with the same number of protons but different numbers of neutrons |
| Atoms with the same number of protons but different numbers of neutrons | isotopes. |
| Distinguish between atoms and ions in terms of the change in number of electrons present in each structure | Atoms are neutral; they contain the same number of protons as electrons |
| Identify the three types of nuclear radiation | alpha particles, beta particles, and gamma particles |
| What is the alpha terms of their mass, charge and general risk to human health? | Type of nuclear radiation with the lowest penetrating ability and largest mass - similar to a helium atom’s nucleus |
| What is the beta of their mass, charge and general risk to human health? | A fast-moving, high energy electron - the second-most penetrating form of nuclear radiation |
| What is the gamma of their mass, charge and general risk to human health? | Massless, chargeless wave that has the highest overall energy of the three types of nuclear radiation |
| nuclear decay equations for both alpha and beta decay | alpha- subtract 4 for mass and 2 for atomic # beta- leave the mass the same and increase the atomic # by 1 |
| What is half-life? | Amount of time needed for half a sample of a radioactive material to decay- The number of arrows = total time / half life |
| calculate amount of a substance remaining after a certain number of half-lives of nuclear decay have occurred, time it will take for a given amount of decay, or the half-life itself given time and mass data | The number of arrows = total time / half life |
| Bohr models for elements based on their electron configurations | Electrons in fixed orbits around nucleus Planetary Model |
| Democritus | original atomic theorist |
| Dalton | law of multiple proportions and billiard ball model of the atom |
| Rutherford | gold foil experiment and identification of the nucleus of the atom |
| Bohr | planetary model of the atom - first indication of electron energy levels |
| Schrodinger / Modern Model | wave/particle duality of electron - electron cloud model of the atom |
| An element exists as 4 different isotopes. 4.35% have a mass of 49.95 amu, 83.79% have a mass of 51.94 amu, 9.50% have a mass of 52.94 amu, and 2.36% have a mass of 53.94 amu. | Average atomic mass = (mass # x % abundance / 100 % )1 + ( Mass # x % abundance / 100 % )2 + … = (49.95 x 4.35 % / 100% ) + (51.95 x 83.79% / 100% ) + (52.94 x 9.50 % / 100 %) + ( 53.94 x 2.36 % / 100 %) = 2.173 + 43.53 + 5.029 + 1.273 = 52.005 amu |
Created by:
user-1874378
Popular Chemistry sets