How do the following traits change in a period from left to right in the periodic table :
1.atomic size
2.matalic character
Answers
Answer:
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.
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ANSWER
Option 1 is correct
B e c a u s e:-
1. Atomic size - On moving from left to right in a period the atomic radius decreases.As we move from left to right the atomic number of each succeeding element increases by 1.Valency - On moving from left to right in a period, the number of valence electrons increases from 1 to 8.