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In general - what happens to the atomic radius from left to right across a period?
Wiki User
∙ 12y ago
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.
Wiki User
∙ 12y ago
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What happens to size of atoms while moving across the 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 is the general trend of atomic radius?
When looking at a periodic table, atomic radius increases from top to bottom, and decreases from left to right. The bottom left corner is the largest, while the top right corner is the smallest radius.
A row across the periodic table is called a?
groupsi
What happens if it does not rain for a long period?
if it does not rain for a long period there could be draught and plants and animals could die.
Where is erbium located on the periodic table?
Erbium is placed in the lanthanoids family; the atomic number is 68.
What happens to the atomic number as you go across a period?
The atomic number increases as one go across a period.
What happens to the atomic number as you move across a period?
.The atomic mass increases
In general howe dose atomic radius change across a period from letf to right?
it decreases
What happens to the reactivity of elements in group a as atomic number increase across a period?
they do becaused they want to do it
Why does atomic size increase from left to right across a period?
atomic size decreases across a period
What happens to the atomic mass as you go across a period from left to right?
It generally goes up, though there are exceptions.
What is the trend in atomic size across the period from sodium to argon?
across a period, the atomic size decreases as the effective nuclear charge increases.
What does atomic radius do across a period?
It decreases.
How does the atomic raduis change across a period of the periodic table?
Atomic radius usually decreases from left to right across a period of the periodic table.
When looking across a period of the periodic table from left to right when happens to the atomic number and electronegativity?
As you move from the left to right, the atomic number increases. Also, the electronegativity increases.
What happens to the atomic radius as you go across a period?
It decreases as you move from left to right because there is an increase in positive charge in the nucleus as you go from left-to-right. Each time you go over an element it has one more electron and proton added to the principal energy level, so the nucleus pull increases and it holds the valence electron in tighter.
How does the atomic number change in a period?
When going left to right across a period, the atomic number of element increases.
