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The number of valence electrons increases.
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∙ 11y ago
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As you move across a period elements have the same number of?
Electron shells
How are valence electrons special?
The closer the number of valence electrons is to the number required to completely fill or deplete its outer shell the more likely the atom is to react. With other electrons in an atom the shells are full and they have little if any affect on the reactivity of an atom. Valence electrons are the only electrons that are available to be shared/transferred in a bond.
What particles play the most active role in chemical bonding?
I think it's electrons.
What are free electrons or delocalized electrons?
Not sure, but maybe you are referring to "lone pair" of electrons.
What do you notice about the number of valence electrons as you move down or up a group or column in the Periodic Table?
The number of Valence electrons of an element is the same number as the element's group number. E.g. Hydrogen is in Group 1. Therefore it has 1 valence electron. Another e.g. Oxygen is in Group 6. Therefore it has 6 valence electrons.
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 happens to the reactivity of metals from left to right across the perriodic table?
Elements become less reactive as you move from left to right across the periodic table. This is due to how many valence electrons (outer-most electrons) the element has; the less valence electrons, the more reactive the element.
As you move across a period elements have the same number of?
Electron shells
What happens to an atom's size as you move from left right across a period?
Atomic Radius Decreases from left to right. From left to right the amount of valence shell electrons increases, maxing out at 8. These valence electrons are pulled by the positively charged nucleus, thus making it smaller from left to right.
What happens when electrons move from one object to another?
getting shocked after walking across a rug
How do valence electrons in a metal move?
They move throught the matel
What happens to the periodic properties as you move across a period?
the mass increases, protons and electrons increase as well
In general - what happens to the atomic radius from left to right across a period?
Generally, it decreases.*As you move from left to right across a period the elements' number of protons increases, increasing the effective nuclear charge (the charge felt by the outermost [valence] electrons after taking into account the shielding electrons). As effective nuclear charge increases the attraction between the nucleus and the valence electrons increases, pulling the valence electrons closer to the nucleus, decreasing the atomic radius.*Please understand that this is not a hard and fast rule. There are other factors to take into account when determining atomic radius, this is just a general trend witnessed.
What happens to a valence electron in a metallic bond?
Valence electrons in a metallic bond are delocalized and can move freely within the metal atoms. This gives metals their malleability and luster.
What happens as you move left to right in periodic table?
The atoms of the element are less reactive and smaller. they are smaller because of the larger amount of valence electrons compacting the atom. Also, there is an increase in ionization energy and electronegativity.
What don you notice about the number of valence electrons as you move from left to right across a row or the period in the periodic table na-mg-al-si-p-s-ci-ar?
The number of valence electrons increases from left to right across a row of the periodic table by an increment of one electron from each element to the next.
How are valence electrons special?
The closer the number of valence electrons is to the number required to completely fill or deplete its outer shell the more likely the atom is to react. With other electrons in an atom the shells are full and they have little if any affect on the reactivity of an atom. Valence electrons are the only electrons that are available to be shared/transferred in a bond.
