Periodic Table Ch 5
Order by
56 terms
Terms | Definitions |
|---|---|
 elements in the same vertical column on the periodic table belong in the same | group |
| elements in the same horizontal row belong in the same | period |
| the most reactive metals | alkali metals |
| non reactive elements | noble gases |
| why was medeleevs periodic table useful | it allowed for the predictions of missing elements |
| most non metals are | poor conductors of electricity |
| how did moseley arrange the periodic table | by increasing atomic number instead of atomic mass |
| how is the periodic table like a calender | it has repeating properties just how the calender repeats days and months |
| why was mendeleev unable to make any predictions about noble gases | they werent known at the time so there were no gaps in the table and no way he could have known a column was missing |
| when an element with 115 protons is synthesizedd will it be a metal nonmetal or metalloid | metal because it would be below bismuth to the left of the zig zag |
| why cant pure sodium be found in nature | it is very reactive it reacts with water and oxygen to make compounds |
| this metal is very reactive has like magnesium and is the same period as bromine | calcium |
| nonmetal in the same group as lead | carbon |
| who was dmmitri medeleev/what did he do | he was the scientist that created the first periodic table of elements |
| what does periodic mean | repeating |
| what are things that are periodic | calenders seasons etc |
| what is periodic about the periodic table | it repeats properties |
| where are the metals located | to the left of the zig zag |
| where are the nonmetals located | to the right of the zig zag |
| where are the metalloids located | on the zig zag |
| properties of metals | conductors shiny |
| properties of nonmetals | not good conductors brittle |
| properties of metalliods | semiconductors |
| why does the atomic radius get smaller as you go across and larger as it goes down | across the force holding the electrons pulls in the electrons down because atoms have to expand |
| what are the seven metalloids | boron silicon germanium arsenic selenium antimony and tellurium |
| which two elements arent metalloids but are on the zig zag | aluminum and astatine |
| which elements are gases at room temp | all the noble gases and clorine fluorine oxygen nitrogen and hydrogen |
| which two are liquids at room temp | mercury and bromine |
| what happens to the valence as you go across the table | it gets larger |
| what happends to the orbital rings as you go down the periodic table | they increase |
| valence | amount of electrons in the outer ring |
| what happens to the reactivity as you go down the groups | it increases |
| properties of alkali metals | 1 valence soft shiny very reactive silvery can easily give away the one electron only found in compounds |
| what causes bipolarism | the inbalance of sodium and potassium in your brain so you have to take lithium pills to trick your brain |
| properties of alkaline earth metals | 2 valence less reactive harder to join with other atoms |
| uses of alkaline earth metals | mg used in airplanes ca found in cement humans plaster etc |
| properties of transition metals | metals, shiny, good conductors 1 or 2 valence higher density and melting points than group 1 and 2 |
| lanthanides | first row follow transition metal lanthanum shiny, reactive, used to make different types of steel |
| actinides | second row, can change into atoms of a different element follow transition metal actinium radioactive, unstable |
| what is the last natural element | uranium |
| what is the most recent atom discovered | uus or 117 |
| what element was recently named and for what | copernicium 112 for the astronomer copernicus |
| properties of the boron group | 1 metalloid and 4 metals 3 valence reactive, solid at room tempurature |
| uses of the boron group | Al most abundant meta used in car parts, aircraft , foil, cans wires |
| properties of the carbon group | 1 nonmetal, 2 metalloids, 2 metals 4 valence reactivity varies among elements solid at room tempurature |
| uses of carbon group | tin keeps steel from rusting carbon is in all organic things and diamonds |
| properties of the nitrogen group | 2 nonmetals, 2 metalloids, 1 metals 5 valence reactivity varies among elements all but nitrogen are solid at room tempurature |
| uses for nitrogen group | Nitrogen makes up 80% of the air you breathe |
| properties of oxygen group | 3 nonmetals, 1 metalloid, 1 metal 6 valence all but Oxygen are solid at room tempurature |
| uses of oxygen group | 20% air breathed is oxygen needed for things to burn and live used in the chemical industry |
| properties of halogens | 7 valence very reactive, only need to gain one electron never found uncombined poor conductors, react violently with alkali metals to form salt, Chlorine-used in disinfectants(treats water) |
| uses of halogens | all react with water to make salt cl is used in disinfectants and to treat water |
| properties of noble gases | 8 valence inert colorless, odorless gases at room tempurature |
| hydrogen group | 1 valence reactive, colorless odorless gas at room tempurature reacts explosively with oxygen, in own group most abundent metal in universe above alkali metals cause of 1 valence |
| What info is located in an elements square on the periodic table | atomic #, mass, name, symbol |
| how do you separate ba, stronium and mg | add chromate which would get rid of the ba then pipet out the mg and stronium into a different beaker add sulfate to get rid of the stronium pipet the mg into a seperate container |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.