Periodic table Flashcards
Calculate the number of moles of water produced when 5.25 moles of methane undergo the reaction depicted below.
CH4 + 2O2 -> CO2 + 2H20
10.5 Moles of water formed.
110g of CO2 were formed as a result of the reaction shown below. how many grams of oxygen must have reacted to form that much carbon dioxide
160g
Is silicon a metal or non metal
a metalloid
what does s,p,d,f stand for?
sharp, principal, diffuse, and fine
in the s block metal get more reactive going up or down the group?
going down
non metals get more reactive as you go up or down the group?
going up
group one is called what?
alkali metals
alkali metals react with water to form what?
metal hydroxides
alkali metals react with oxygen to produce what?
metal oxides
alkali metals react with halogens to form ?
ionic salts
what are group 2 referred to as and what is its reactivity determined by?
alkaline earth metals
the reactivity increases down the group as the electrons become easier to remove as they get further away from the nucleus
Where are the highest melting points on the periodic table?
left side, the giant structures.
The right tend to have low melting points and boiling points.
atomic radius and ionic radius ___increase/decrease____ as you move across a period and ____in/de____ as you move down a group?
increase as you move down a group and decrease as you move across a period
Electron affinity ____de/increases___ as you move down a group but ___de/increases___ as you move across a period.
Electron affinity decreases as you move down a group, but decreases as you move across a period until the last column. The elements in this group, the noble gases, have practically no electron affinity.
Elements with the ___lowest/highest___ metallic character are located on the lower left side of the periodic table. Lowest/highest__is on the upper right side.
Elements with the highest metallic character are located on the lowest left side of the periodic table. Elements with the highest is on the upper right side of the table.
