magnetic quantum number of any element of the period
atomic number of any element of the period
maximum principal quantum number of any element of the period
maximum azimuthal quantum number of any element of the period
Be
ln
Os
All of these
5th period IInd group
6th period IIInd group
6th period IInd group
1th period IInd group
`He, Ne, Ar`
`Ni, Cu, Zn`
`Cl , Br , I`
`Na, Cu, Mg`
The properties of elements are periodic function of their atomic numbers
Non-metallic elements are less in number than metallic elements
For transition elements, the 3d-orbitals are filled with electrons after 3forbitals and before 4s-orbitals
The first ionisation enthalpies of elements generally increase with increase in atomic number as we go along a period
atomic weight
atomic number
atomic volume
atomic energy
(This question may have multiple correct answers)
s-block
p-block
d-block
f-block
IA
IIA
VIA
None of these
Curium (Z = 96)
Californium (Z = 98)
Uranium (Z = 92)
Terbium (Z = 65)
`Zr`
`Zn`
`Ti`
None of these
A and B are metals
A and B are non - metals
A is a metal and E is a non-metal
A is a non-metal and B is a metal
There is a gradual decrease in tile raclii of the members with increasing atomic number in tile series
All the members exhibit + 3 oxidation stale
Because of similar properties tile separation of lanthanoids is not easy
Availability ot 4f-electrons results in the formation of compounds in +4 state for all members of the series
actinoids
transition elements
lanthanoids
halogens
metalloid
non-metal
transition metal
metal
s-block elements
d-block elements
p-block elements
All of the above
Lanthanum
Argon
Chromium
Aluminium
Element | Atomic radius (pm) | ||
---|---|---|---|
Be | 74 | ||
C | 88 | ||
O | 111 | ||
B | 77 | ||
N | 66 |
Lead
Silicon
Carbon
Tin
`N`
`O`
`F`
`Ne`
`F < O^(2-) < Mg^(2+) < Na^(+)`
`Mg^(2+) < Na^(+) < F^- < O^(2-)`
`O^(2-) < F^(-) < Na^(+) < Mg^(2+)`
`O^(2-) < F^(-) < Mg^(2+) < Na^(+)`
`Be^(2+)`
`Mg^(2 +)`
`Ca^(2+)`
`Sr^(2+)`
inverse proportion to the effective nuclear charge
inverse proportion to the square of effective nuclear charge
direct proportion to the screening effect
direct proportion to the square of screening effect
increases
decreases
remains same
None of these
`Be < B < C < N < O`
`B < Be < C < O < N`
`Be > B > C > N > O`
`B < Be < N < C < O`
`F > Cl > Br > I`
`F < Cl < Br < I`
`F < Cl > Br > I`
`F < Cl < Br < I`
copper
cesium
barium
chromium
`F -> F^-`
`Cl -> Cl^-`
`O -> O^(2-)`
`H -> H^-`
`A < C < B < D`
`A < B < C < D`
`D < B < C < A`
`D < A < B < C`
1 2 3 4
3 4 2 1
4 3 2 1
2 1 4 3
(This question may have multiple correct answers)
(This question may have multiple correct answers)
`Li`
`B`
`Na`
`Ne`
increase in lattice energy
decrease in lattice energy
increase in ionisation energy
increase in thermal stability
`I > I^(-) > I^(+)`
`I^(+) > I^(-) > I`
`I > I^(+) > I^(-)`
`I^(-) > I > I^(+)`
`1`
`2`
`3`
`4`
(This question may have multiple correct answers)
`Na > Mg > Al > Si`
`Na < Mg < Al < Si`
`Na < Si < Al < Mg`
`Na < Al < Mg < Si`
`Na < Mg < Al < Si`
`Na > Mg > Al > Si`
`Na < Mg < Al < Si`
`Na > Mg > Al < Si`
They are d - block elements
they belong to the same group
of increased nuclear charge
of anthande contraction
the second ionisation energy is always more than the first
With in a group, there is a gradual increaces in ionisation energy because nuclear charge increases
Ionisation energy of the Be is more then B
Ionisation energy of noble gases are high
3 1 2 4
3 1 4 2
4 2 1 3
4 2 3 1
(This question may have multiple correct answers)
`Na`
`Li`
`Mg`
`k`
coloured
colourless
paramagnetic
colourless and diamagnetic
zero group
first group
IIIrd group
VII group
Lather Meyer
Mendeleev
Ramsay
Lockyer
nitrogen
phosphorus
antimony
arsenic
Silicon, garmanium and tin
garmanium and tin
garmanium tin and lead
tin and lead
greater shielding power of s - electrons of Ga-atom
poor shielding power of s-electrons of Ga-atom
poor shielding power of d-electrons of Ga-atom
greater shielding power of d - electrons of Ga-atom
small size and high electronegativity
non - availability of d-orbital in valence
ease of multiple bond formation
All of the above are correct
silver (`Ag`) and lead (`Pb`)
copper `(Cu)` and aluminium `(Al)`
silver `(AQ)` ancl gold `(Au)`
copper `(Cu)` and gold `(Au)`
ci·block elements show irregular and erratic chemical properties among themselves
La and Lu llave partially filled d-orbilals and no other partially filled orbitals
The chemistry of various lanthanoids is very similar
4f and 5f-orbitals are equally shielded
Aluminium
Manganese
Magnesium
Calcium
mercury
Lead
Sodium
Calcium
Copper
Iron
Zinc
Nickel