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Do valence electrons increase or decrease across the row of tables?
Wiki User
∙ 7y ago
They increase from left to right.
Wiki User
∙ 7y ago
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Would the trend in atomic size cause an increase or a decrease in the attraction between the nucleus and the valence electron within the group as the atomic number increases?
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 do you notice about the number of valence electrons as you move from left to right across a row or period?
The number of valence electrons increases from left to right across a period.
What do you notice about the valance electrons as you move down a group?
stays the same Well... that's not really true... the number of them stays the same, but several things happen to them. First off they are further from the nucleus. And they are further shielded by additional electrons between the valence and nucleus. This causes a looser association and tends to make the atom more volatile.
How does the number of valence electrons for element change across a period?
The number of valence electrons for the elements increases across a period, from 1 (group 1) to 8 (group 18).
How does the number of valence electrons change as you go across the 2nd period of the periodic table?
the no. of electrons increses
Why does electronegativity increase or decrease across a period?
Electronegativity is affected by: atomic number of the element, distance between the nucleus of an atom and the valence electrons or sometimes by the so-called "d-block contraction".
What happens to valence electrons as you move across the row?
The number of valence electrons increases.
What is the trend of valence electrons across each period?
The number of valence electrons increases as you go across a period. For example in period 2 the number of valence electrons rises from 1 in Li up to 8 in neon.
Would the trend in atomic size cause an increase or a decrease in the attraction between the nucleus and the valence electron within the group as the atomic number increases?
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 do you notice about the number of valence electrons as you move from left to right across a row or period?
The number of valence electrons increases from left to right across a period.
What do you notice about the valance electrons as you move down a group?
stays the same Well... that's not really true... the number of them stays the same, but several things happen to them. First off they are further from the nucleus. And they are further shielded by additional electrons between the valence and nucleus. This causes a looser association and tends to make the atom more volatile.
How does the number of valence electrons for elements across a period?
The number of valence electrons for the elements increases across a period, from 1 (group 1) to 8 (group 18).
Elements across a series have the same number of?
They don't have the same number. that's what makes thme all different
How does the number of valence electrons for element change across a period?
The number of valence electrons for the elements increases across a period, from 1 (group 1) to 8 (group 18).
How does the number of valence electrons change as you go across the 2nd period of the periodic table?
the no. of electrons increses
Why does electronegativity increase as you move left to right across a period?
As you move across a period from left to right, the number of protons increases, and the number of electrons increases in the valence shell. This makes the attraction between the electrons and protons stronger and stronger, and therefore the atomic radius of the atom decreases. This means that any atoms flying by with available weak bonded electrons will bond with this element because the distance between the valence shell and protons decrease making the attraction to the nucleus stronger for free electrons.
What is the trend in electronegativity and ionization energy as you go down a row or across a period?
Electron configuration is the arrangement of elements according to their increasing atomic numbers whiles period is the arrangement of elements according to the increasing number of valence electrons.
