Why does electronegativity increase as you go across a period?
It is no wonder the electron pair gets dragged so far towards the chlorine that ions are formed. Electronegativity increases across a period because the number of charges on the nucleus increases. That attracts the bonding pair of electrons more strongly.
How does electronegativity vary in a group and in a period?
The tendency of an atom to attract the shared pair of electrons towards itself is known as electronegativity. Electronegativity increases across a period while it decreases down a group. Atomic radius increases down the group due to addition of new shell.
What is the least electronegative element?
francium
What increases across the periodic table?
Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.
How does the atomic radius change as you go from left to right in a period?
The atomic radius of atoms generally decreases from left to right across a period. Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level. These electrons are gradually pulled closer to the nucleus because of its increased positive charge.
Does atomic radius increases across Period 3?
Explanation of this trend Going across period 3: the number of protons in the nucleus increases so … therefore the force of attraction between the nucleus and the electrons increases … and the atomic radius decreases.
Which element in period 3 has the largest covalent atomic radius?
Sodium
What is the most metallic element in period 2?
Lithium
Which is the most metallic element Why?
The most metallic element is francium. However, francium is a man-made element, except for one isotope, and all isotopes are so radioactive they almost instantly decay into another element. The natural element with the highest metallic character is cesium, which is found directly above francium on the periodic table.
Which element in period 3 is most metallic in nature?