What happens to electrons when you move from left to right across a period?
The number of electrons increase when the atomic number
How does the effective nuclear charge experienced by the valence electrons of an atom vary going from left to right across a period of the periodic table?
What happens to the number of values electrons as you move from left to right in the periodic table?
What generally happens to the first ionization energy of the element's within a period as the atomic number of the element's increases?
As you move from left to right across a period, the attraction an atomic nucleus has for the atom's electrons increases. This is because positively charged, relatively heavy protons are being added to the nuclei as you move from left to right, and the additional protons have an increased attraction for the negatively charged and nearly weightless electrons.
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…
When an atom moves across a period, the size (atomic radius) decreases because there are more protons and electrons, which create greater attraction and thus shrinks the size. When dealing with transition metals, the atomic radius decreases and then increases across a period. This is because there is an initial increased attraction between the protons and electrons and then a repulsion of electrons when more electrons are added to the same electron shell.
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…
What is the number of valance electrons as you move right across a row or period in the periodic teale?
When looking across a period of the periodic table from left to right when happens to the atomic number and electronegativity?
from left to right the atomic radius decreases as the electrons that get added are added in the same shell as they are in the same period. the shielding effect remains constant but the proton number increases which inturn increases the effective nuclear pull on the electrons bringing the electrons closer to the nuclei hence decreasing the radius of the atom
The general trend is a decrease in size as you move from left to right . This is apparent in periods 2 and 3 but in period 4 and above we have the transition metals and these have some exceptions. This is due to the fact that as we moves from left to right along a period while the nuclear charge increases we are also adding extra electrons but the effective charge is mainly affected…