Answer:
Explained.
Explanation:
Only the first question has been answered
In a period from left to right the nuclear charge increases and hence nucleus size is compressed. Thus, atomic radius decreases.
In transition elements, electrons in ns^2 orbital remain same which is the outer most orbital having 2 electrons and the electrons are added to (n-1) d orbital. So, outer orbital electron experience almost same nuclear attraction and thus size remains constant.
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Explanation:
At first it is in 14m position but position doesn't matter in displacement, similar case for time taken.
So at first it travels 6m in positive direction.
So displacement= 6m
Then it travels 13 in opposite or negative direction.
So displacement = 6 -13 m = -7 m
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The Noble Gases are the most unreactive b/c its outermost shell completes the energy level and is stable enough.
Elements in the each group have the same number of valence electrons.
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Answer:
force of friction
Explanation:
the force of friction in an inclined place is less than that in lever, also a lever works on the principle that it reduces the amount of force required to to work while an inclined plane works by decreasing the amount of force required to do the work.