the principle energy level
Answer: Option (A) is the correct answer.
Explanation:
Electronegativity is the ability of an atom to attract electrons towards itself.
When we move across a period in the periodic table then there occurs an increase in the electronegativity of the elements because of decrease in their atomic size.
This is because electrons add to the same sub-shell and due to electrostatic force of attraction from the nucleus they get pulled closer towards the nucleus leading to shrinkage in size.
And, smaller is the size of an atom more readily it will attract an electron.
Therefore, we can conclude that electronegativity increases across a period.
Answer:
the force applied to the rubber band is -9.3N
Explanation:
The computation of the force applied to the rubber band is shown below;
We know that
Force in newtons = Spring constant × amount of extension
F = -k × x
where
-k = 62 N/m
And, x = 0.15m
So, the force applied is
= -62N/m × 0.15m
= -9.3N
hence, the force applied to the rubber band is -9.3N
Answer:
0.0738 M
Explanation:
HNO3 +LiOH = LiNO3 + H2O
Number of moles HNO3 = number of moles LiOH
M(HNO3)*V(HNO3) = M(LiOH)*M(LiOH)
M(HNO3)*50.0mL = 0.100M*36.90 mL
M(HNO3) = 0.100*36.90/50.0 M = 0.0738 M
answer: Surface water in nearby areas can become polluted.
Explanation:
