Periodic Table

Question 1

what is periodic table? based on?
how is periodic table?
in vertical columns what is similar?

Question 2

how many elements in periods? short/long periods?
what is family?

Question 3

how are groups numbered?
what part of period table has or indicates same no. of valence electrons?

Answer 3

elements in the same grp
group number

Question 4

group 13, 14, 15 has how many valence electrons?
13-18 grp no is equal to?
group A/B elements are called?
names of group 1, 2, 13, 16, 17, 18

Answer 4

no. of valence electrons + 10

Question 5

what is block of an element? how many blocks in the periodic table?
describe?

Question 6

by examining valence electron config., n-value & sub-shell type, you can identify?
to determine grp of an element, you need to know?
what if an element is in in p block?

Answer 6

an element’s grp, period & block
no. of electrons in the valence shell

Question 7

what does n value indicate?
period no. of an element indicate?
total no. of electrons in the valence shell represent
total no. of electrons in the valence shell represent p block

Question 8

chemical periodicity?
what has similar chemical properties? cz?

Answer 8

pg 216

Question 9

properties of elements in a grp

Question 10

period number=
group number=

Answer 10

pg 218

Question 11

elements types?

Question 12

metalloids?

Question 13

why in a grp they have similar chemical properties?

Answer 13

cz chemical properties depend upon valence shell config and grp has same valence shell config

Question 14

physical properties of elements depend on?

Question 15

electron affinity? it explains? aka? eqn? depends on?

Question 16

electron affinity tends to _____ across the period. how?

Answer 16

increase
nuclear charge increases
atomic size decreases
shielding effect constant

Question 17

electron affinity tends to _____ along a grp? why

Answer 17

decrease
atomic size increases
shielding effect increases

nuclear charge increases not imp

Question 18

where are metals usually found in the periodic table?
why do they tend to form cations/anions? give reasons

Answer 18

left side
cations

Question 19

where are non metals usually found in the periodic table?
why do they have the non metallic behv? reasons?

Answer 19

right side
pg 221

Question 20

why do grp 1metals have strong metallic charcater?

Answer 20

cz as u move down the grp
metallicty increases due to

Question 21

grp 7 have strong non metallic charcater why?
what if you move down the group?

Question 22

explain the trend of grp IV A? what elements does it consist of?

Answer 22

5

Question 23

electronegativity? and their number? ionic covalent and polar?
ionic character in a bond increases with increase in?

Question 24

reaction with Oxygen? Na & Mg

Question 24

reaction with chlorine? Na & Mg

Question 25

reaction with water? Na Mg

Question 26

oxidation number? meaning? max? is it -ve? show trend of it in period?

Question 27

metal oxides ___ in character? why? what about non metallic oxides?

Question 28

basic character of oxides ___ across a period. this means? E.N b/w these elements & Oxygen ___ across period. that means oxides of Na & Mg are ____ compounds. has ___ melting & boiling points soluble or no in water? aq. sol.?

Question 29

what abt other oxides? like P S Cl? exist as? melting/boiling points? elements of 3rd period form oxides as? these oxides turn from ___ to ____

Question 30

oxide & hydroxide of Na, Mg & Al?

Question 31

reaction of chlorides in water? metal & non metal chlorides

Question 32

types of chemical bonding in chlories and oxides? basis?

Question 33

I.E ___ along a group? factors?

Question 34

identification of an unkown element just from Z