atomic size

Generally atomic radii _________ when going down a group in Periodic Table

• Increase

• Decrease

• Constant

Going Across a Period from left to right, the proton number will increased. This will cause the _________ also increase

• Number of inner electrons

• Shielding effect

• Effective nuclear charge, Zeff

• Atomic radii

When going Down the SAME group, number of shell increase and it will cause the _________ effect to be increase. (HURUF BESAR)

Arrange the following atom in order of increasing atomic size

¹³Al,⁶C, ⁹F , ³Li , ⁷N, ¹⁵P

(tulis simbol element sahaja & guna comma )

Fluorine with proton number of 9 has the value of Zeff of ______

Attraction between nucleus and valence electrons in F is _________ compare to ⁸O.

Thus atomic size of F ______ than ⁸O

• +7

• +5

• weaker

• stronger

• smaller