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
chem sem. final
chemistry
| Question | Answer |
|---|---|
| matter that has definite properties and definite composition | pure substance |
| the 2 types of pure substances | elements and compounds |
| is H2O an element or compound? | compound |
| what is a physical property | observed w/o changing the substance |
| what is a chemical poperty | observed after substance forms a new substance |
| what was Thomson's cathode ray experiment | cathode ray attracted to the positive plate |
| what particle did Thomson discover | the electron |
| what did the ratio of alpha particles deflected tell Rutherford about the nucleus of the atom | it is very small |
| what subatomic particles must be the same for every atom of a given element | the proton |
| charge of a proton | +1 |
| mass of a proton | 1 amu |
| location of proton | in the nucleus |
| charge of electron | -1 |
| mass of electron | 0 amu |
| location of electron | outside the nucleus |
| charge of neutron | no charge |
| mass of neutron | 1 amu |
| location of neutron | in the nucleus |
| what 2 things must be equal in a neutral atom | proton and electron |
| what are isotopes | atoms of the same element w a different mass |
| what is the average of the naturally occurring isotopes of an element | average atomic mass |
| what is radioactive decay | spontaneous breakdown of an unstable nucleus |
| what are 3 types f nuclear radiation | alpha, beta, gamma |
| what is the order of the modern periodic table based on | atomic number |
| how did mendeleev change the periodic table | changed to order of atomic mass and left blank spots for undiscovered elements |
| moseley developed the idea of __________ which is the amount of positive charge in an atom | atomic number |
| what group number are alkali metals | group 1 |
| what group are alkaline earth metals | group 2 |
| what group are halogens | group 17 |
| what group are noble gasses | group 18 |
| where are metals of the p.t? | left of the stair step |
| where are nonmetals on the p.t? | right of the stair step |
| where are metalloids on the p.t | along the stair step |
| what are some properties of metals | good conductors, high melting points, malleable |
| what is the most reactive metal | alkali metals |
| what group of nonmetals is the most reactive | halogens |
| does atomic radius increase or decrease when you go down a group | increase |
| does atomic radius increase or decrease as you go across the p.t | decrease |
| what is electronegativity | the ability to attract an electron in a chemical bond |
| what is ionization energy | the energy needed to remove an electron form an atom |
| does ionization energy and electronegativity increase or decrease when moving down a group | decrease |
| does ionization energy and electronegativity increase or decrease moving across the p.t | increase |
Created by:
10013244
Popular Chemistry sets