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Answer:
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1)(i)The atomic radii of the d - block elements is decreasing slowly from left to right.
(ii)while we move slowly from left to right the electron which was filled at last will enter the penultimate d subshell.
(iii)the one more thing which happens when we move slowly from left to right is the nuclear charge increase by 1.
(iv)so,the result is the atomic number and nuclear charge increases.
(v)therefore,the atomic radii slowly decrease as we move left to right on the transition series.
2)➣whenever,two electrons are paired together or the result of the spin is 0 . they are called as diamagnetic electrons.
➣whenever,the atom has a net spin of one orbital . it is called as paramagnetic electrons.
\red{ \sf➠{Zn}^{2 + } = diamagnectic.}➠Zn
2+
=diamagnectic.
\pink{ \sf➠{Ti}^{3 + } = paramagnetic.}➠Ti
3+
=paramagnetic.
\purple{ \sf➠ {Co}^{2 + }= paramagnetic.}➠Co
2+
=paramagnetic.
additional information:
➠Atoms with all diamagnetic electrons are called diamagnetic atoms.
➠an atom have 10 diamagnetic electrons.
➠No+ is paramagnetic.
➠examples of paramagnetic - aluminium and oxygen.
Answer:
12500 Joules is the required energy.
Given:-
Time taken ,t = 10 h
Number of Devices ,n = 5
Power of each device ,P = 250 W
To Find:-
Energy Consumed by Devices,E
Solution:-
As we have to calculate the Energy Consumed by devices in 10 hours .
Energy is defined as the Product of Power and Time.
• E = P× n × t
Where,
P denote Power of device
n denote number of devices
t denote time
Substitute the value we get
→ E = 250×5 × 10
→ E = 1250 × 10
→ E = 12500 J or 12500 Wh = 12.5 kWh
Hence , the energy consumed by the devices is 12500 Joules .