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Atomic size increases from top to bottom in a group due to increase in theshieldingeffect.
As you go down the group shielding from core electrons increases (as more core electrons are added), therefore valence electrons experience weaker attraction forces from the nucleus and are located further away from it, resulting in an increase in size.
If you move across a period the attraction between the nucleus and valence electrons increases because the number of protons and the number of valence electrons both go up whereas the number of core electrons stays the same (shielding decreases). In this case the size decreases.
What else can I help you with?
Does a nonmetallic character increase or decrease down a group?
Down a group, the number of shells increases, also the atomic size. Thus , the metallic character increase does increase as going DOWN a group. It is easy to remove an electron froman atom of bigger size.
Why do force of attraction between nucleus and electrons decrease in alkali metal as increase in size?
As alkali metals increase in size, the distance of the outermost electrons from the nucleus increases. The attraction between the electrons and the nucleus is electrostatic, and it is a fundamental property of electrostatic attractions that the attraction decreases with increasing distance between the attracting charges. Another way of describing this is that the attractive force is partially "screened" by the inner electrons between the outermost electrons and the nucleus.
Does the speed increase or decrease with the attraction between particles when changed from liquid to gas?
Yes, the speed increases when a liquid changes to a gas, And the attraction between particles also decreases. :) -Anouymous
Why Ionization potential decrease from top to bottom in s block element?
As from top to bottom on a periodic table one energy shell is added. Thus the distance between the electrons and the protons increase and the attraction force decreases. Then it becomes easier to get one electron out from the most outer shell. This is why the ionization potential decreases.
Does nonmetal activity tend to decrease or increase as one goes down group 17?
Nonmetal activity tends to decrease as one goes down Group 17 (halogens) because the atomic size increases along the group, leading to weaker attraction for electrons and thus decreasing reactivity. Additionally, the atomic number increases which leads to increasing electron shielding and decreasing effective nuclear charge, reducing the tendency to gain electrons.
What happens to the energy needed to remove an electron as the atomic number increases down a family?
As the atomic number increases down a family, the energy needed to remove an electron decreases. This is because electrons are further from the nucleus with increasing atomic number, leading to weaker attraction and therefore less energy required to remove an electron.
Does a nonmetallic character increase or decrease down a group?
Down a group, the number of shells increases, also the atomic size. Thus , the metallic character increase does increase as going DOWN a group. It is easy to remove an electron froman atom of bigger size.
Why do force of attraction between nucleus and electrons decrease in alkali metal as increase in size?
As alkali metals increase in size, the distance of the outermost electrons from the nucleus increases. The attraction between the electrons and the nucleus is electrostatic, and it is a fundamental property of electrostatic attractions that the attraction decreases with increasing distance between the attracting charges. Another way of describing this is that the attractive force is partially "screened" by the inner electrons between the outermost electrons and the nucleus.
If interest rate increases will inflution increase or decrease?
If interest rate increases will inflution increase or decrease?"
What would happen to two magnets if the distance between them increase?
As the distance between two magnets increases, the force of attraction or repulsion between them will decrease. This decrease is due to the weakening of the magnetic field as the distance between the magnets increases.
Does the speed increase or decrease with the attraction between particles when changed from liquid to gas?
Yes, the speed increases when a liquid changes to a gas, And the attraction between particles also decreases. :) -Anouymous
If an asset increases is it an increase or decrease in cash?
if an asset increases, is it an icrease or decrease in cash?
Does density increase or decrease when kinetic energy increases?
it increases
Does present value increase or decrease when the interest rate increases?
decrease
Do increases in accrued expenses increase or decrease cash flow?
Decrease
What happens to ionic radius if you add an electron?
Adding an electron to an atom increases its negative charge, leading to an increase in electron-electron repulsions. This results in the outer electron shell expanding, causing the ionic radius to increase.
Why Ionization potential decrease from top to bottom in s block element?
As from top to bottom on a periodic table one energy shell is added. Thus the distance between the electrons and the protons increase and the attraction force decreases. Then it becomes easier to get one electron out from the most outer shell. This is why the ionization potential decreases.
