Periodic table

Question 1

Calculate the number of moles of water produced when 5.25 moles of methane undergo the reaction depicted below.

Answer 1

CH4 + 2O2 -> CO2 + 2H20

10.5 Moles of water formed.

Question 2

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

Answer 2

160g

Question 3

Is silicon a metal or non metal

Answer 3

a metalloid

Question 4

what does s,p,d,f stand for?

Answer 4

sharp, principal, diffuse, and fine

Question 5

in the s block metal get more reactive going up or down the group?

Answer 5

going down

Question 6

non metals get more reactive as you go up or down the group?

Answer 6

going up

Question 7

group one is called what?

Answer 7

alkali metals

Question 8

alkali metals react with water to form what?

Answer 8

metal hydroxides

Question 9

alkali metals react with oxygen to produce what?

Answer 9

metal oxides

Question 10

alkali metals react with halogens to form ?

Answer 10

ionic salts

Question 11

what are group 2 referred to as and what is its reactivity determined by?

Answer 11

alkaline earth metals
the reactivity increases down the group as the electrons become easier to remove as they get further away from the nucleus

Question 12

Where are the highest melting points on the periodic table?

Answer 12

left side, the giant structures.

The right tend to have low melting points and boiling points.

Question 13

atomic radius and ionic radius ___increase/decrease____ as you move across a period and ____in/de____ as you move down a group?

Answer 13

increase as you move down a group and decrease as you move across a period

Question 14

Electron affinity ____de/increases___ as you move down a group but ___de/increases___ as you move across a period.

Answer 14

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.

Question 15

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.

Answer 15

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.