Trends in transition elements

Why is zinc not considered a transition metal?

• Zinc is not a transition metal because it gains two 4s electrons to give a 2+ion with full d subshell levels.

• Zinc is not a transition metal because it loses four 4s electrons to give a 4+ion with full d subshell levels.

• Zinc is not a transition metal because it loses two 4s electrons to give a 2+ion with full d subshell levels.

• Zinc is not a transition metal because it gains two 4d electrons to give a 2+ion with full d subshell levels.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Density of transition metals is greater than the density of the Group 1 and 2 metals.

• True

• false

Arrange the melting point of manganese, magnesium and potassium in increasing order.

• K<Mg<Mn

• Mn<K<Mg

• Mn<Mg<K

• Mg<Mn<K

Tags

NGSS.MS-PS1-4

How many degenerate d orbitals in 3d subshell?

• 2

• 3

• 4

• 5

1. The electron configuration of iron in FeO₄^2- ion is

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

Write the electronic configuration for Cr³⁺.

magnetic moment is given by

• √n(n+1) BM

• √n(n+2) BM

• √n(n+3) BM

• √n(n) BM

The element having two unpaired electrons will be paramagnetic or diamagnetic?

• Paramagnetic

• Diamagnetic

• Both

• None of the above

The trend of ionization enthalpies of the transition elements is?

• IE1>IE2 <IE3

• IE1>IE2 >IE3

• IE1<IE2 <IE3

• IE1<IE2 >IE3

the IE of the third transition series is much higher than the first and second because of

• they have higher atomic number

• strong screening effect of 4f shell

• they are placed at the bottom in the periodic table.

• poor screening effect of 4f shell