classification of element

Arrange the following orbitals in order of increasing energy.

3dxy, 2px, 3dyz, 4pz, 3pz, 4dxy, 3py, 2py, 3s, 4s, 2s, 1s

• 1s , 2s , 2px, 2py , 3s , 3pz, 3py , 4s , 3dxy, 3dyz , 4pz , 4dxy

• 1s, 2s, 2px, 2py, 3s, 3pz, 3py, 3dxy, 3dyz, 4s, 4pz, 4dxy,

• 1s < 2s < 2px, 2py < 3s < 3pz, 3py < 4s < 3dxy, 3dyz < 4pz < 4dxy

• 1s< 2s < 2px, 2py < 3s < 3pz, 3py < 3dxy, 3dyz < 4s < 4pz < 4dxy

Fill in the blank:

According to Aufbau principle;

Electron must occupy orbitals of ______(a)__________ energy first before

________(b)___________ energy.

• (a) higher

  (b) lower

• 
  (a) lower

  (b) higher

• (a) singly

  (b) paired

• (a) paired

  (b) singly

spdf notation of Cl with 17 proton number is

(letak spacebar,huruf kecil)

The actual electronic configuration of copper is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹ 3d¹⁰ which is differs from the expected configuration. This due to stability of ----- filled 3d orbital

• FULLY

• PARTIALLY

• HALF FILLED

The electronic configuration of ₂₆Fe²⁺ is

(LETAK SPACEBAR & HURUF KECIL)

Three elements A, B and C have 3, 4 and 2 electrons respectively in their outermost shell. Write the valence electronic configuration and determine the group to which they belong in the Periodic Table.

• A : ns² nd1

  Group : 3

• B : ns² np²

  Group : 14

• C : ns²

  Group : 12

• B : ns² np⁴

  Group : 16

which elements belong to the same group

• B, C,D,G

• E, F

• D,F

Identify the non-metals among the elements.

• A

• C,D,G,F

• A, B, E

Ion M^2- has the electronic configuration of 1s² 2s² 2p⁶ . Determine group , period and block of element M

• Group : 18

  Block : p

  Period : 2

• Group : 2

  Block : s

  Period : 3

• Group : 14

  Block : p

  Period : 2

Write the electronic configuration of element B that are in d-block , period 5 and group 12