the periodic table

Question 1

how did Mendeleev structure his periodic table

Answer 1

He​ ​ordered​ ​his​ ​table​ ​in​ ​order​ ​of​ ​atomic​ ​mass,​ ​but​ ​not​ ​always​ ​strictly​ ​–​ ​i.e.​ ​in some​ ​places​ ​he​ ​changed​ ​the​ ​order​ ​based​ ​on​ ​atomic​ ​weights.

Question 2

what did Mendeleev do that was different to the early periodic tables

Answer 2

Left​ ​gaps​ ​for​ ​elements​ ​that​ ​he​ ​thought​ ​had​ ​not​ ​been​ ​discovered​ ​yet

Question 3

how did mendeleev use his table to predict future elements

Answer 3

Mendelev​ ​realised​ ​elements​ ​with​ ​similar​ ​properties​ ​belonged​ ​in​ ​the​ ​same​ ​groups in​ ​the​ ​periodic​ ​table​ ​so​ ​was​ ​able​ ​to​ ​leave​ ​gaps​ ​and​ ​place​ ​the​ ​discovered elements​ ​where​ ​they​ ​fit​ ​best

Question 4

what meant mendeleev had not arranged his elements in order of increasing relative mass

Answer 4

some​ ​elements​ ​have​ ​a​ ​higher mass​ ​than​ ​others​ ​when​ ​isotopes​ ​are​ ​taken​ ​into​ ​account,​ ​but​ ​a​ ​lower​ ​one​ ​if​ ​you only​ ​look​ ​at​ ​one​ ​specific​ ​isotope.

Question 5

how do the number of protons affect the atoms position in the periodic table

Answer 5

Elements​ ​are​ ​arranged​ ​in​ ​order​ ​of​ ​atomic​ ​(proton)​ ​number​ ​(bottom​ ​number)​ ​and
so​ ​that​ ​elements​ ​with​ ​similar​ ​properties​ ​are​ ​in​ ​columns,​ ​known​ ​as​ ​groups.

Question 6

what do the amount of electrons in the outer shell mean for atoms

Answer 6

Elements​ ​in​ ​the​ ​same​ ​group​ ​have​ ​the​ ​same​ ​amount​ ​of​ ​electrons​ ​in​ ​their​ ​outer
shell,​ ​which​ ​gives​ ​them​ ​similar​ ​chemical​ ​properties

Question 7

what do metals react to form

Answer 7

metals react to form positive ions

Question 8

what do non metals form

Answer 8

non metals do not form positive ions

Question 9

what does the group tell you in relation to the electron configuration

Answer 9

the​ ​group​ ​an​ ​electron​ ​is​ ​in​ ​tells​ ​you​ ​how​ ​many​ ​electrons​ ​are​ ​in​ ​its​ ​outermost shell​ ​aka​ ​group​ ​1​ ​elements​ ​have​ ​1​ ​electron​ ​in​ ​their​ ​outer​ ​shell

Question 10

what does the period tell you in relation to the electron configuration

Answer 10

the​ ​period​ ​an​ ​electron​ ​is​ ​in​ ​tells​ ​you​ ​which​ ​number​ ​shell​ ​an​ ​element’s​ ​outermost electron​ ​is​ ​found​ ​in​ ​aka​ ​period​ ​3​ ​elements​ ​have​ ​their​ ​outermost​ ​electrons​ ​in shell​ ​3