Question

in the periodic table across a period the _____ number of electron increases by one unit.
Please answer fast​

Answer 1

Explanation:

On moving from left to right in a period, the chemical reactivity of elements first decreases and then increases. On moving from left to right in a period, the number of valence electrons increases from 1 to 8. On moving from left to right in a period, the atomic size decreases; the size of the atoms decreases. Since the atomic size decrease when we move from left to right in a period, therefore, electronegativity increases in moving left to right. Atomic size increases when moving down in a group thus electronegativity decreases when we move from top to bottom in the periodic table.

Metallic character decreases as you move across a period in the periodic table from left to right. This occurs as atoms more readily accept electrons to fill a valence shell than lose them to remove the unfilled shell.

Answer 2

Answer:

periodic trend of ionization energy across a period – As we move from left to right in a period, ionization energy gradually increases. Reason – As we move left to right in a period atomic size or atomic radius decreases while nuclear charge increases.

Explanation: