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ENHANCEMENT PERIODIC TABLE Flashcards | StudBud
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ENHANCEMENT PERIODIC TABLE
ENHANCEMENT PERIODIC TABLE
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1
Which
ion
has the smallest ionic radius? [ proton number: K=19 ; Ca =20; P=15; CI =17 ]
Ca 2+
K +
P 3-
CI -
2
Formula calculation Zeff is proton number - number of inner electron
True
False
3
1s
2
2s
2
2p
6
3s
1
from the electronic configuration determine the period.
3
2
1
7
4
Choose INCORRECT statement of going down the group in periodic table
attaractionof nucleus-valence electron weaker,so electronegativity decrease
more energy needed to remove one electron ,first ionization energy increase
shielding effect increase thus atomic radius increase
effective nuclear charge increase , thus atomic radius decrease
5
Element P,Q and R have 18,19 and 20 protons respectively. Atomic size of P is the smallest .What is the factor affected?
smallest the relative atomic mass
largest effective nuclear charge
smallest number of protons
least number of shells
6
To determine the group of an element in block d we need to +10 to the valence electron
False
True
7
Which of the following elements has the lowest first ionisation energy?
Magnesium
Potassium
Aluminium
Sodium
8
ELEMENTS WERE ARRANGE IN ASCENDING ORDER IN PERIODIC TABLE
False
True
9
Which property is increasing across
period 3
from left to right?
melting point
oxidation number
ionisation energy
atomic radius
10
Elements in the same group have same __________
all the above
number of valence electrons
number of inner electron
number of proton
