Electronic Configuration of d Block

Q.

Which of the following transition elements will have a half-filled d-orbital?

1. Titanium (Ti)

2. Iron (Fe)

3. Zinc (Zn)

4. Chromium (Cr)

Q.

Which of the following elements is used to make pencil lead?

1. Carbon

2. Lead

3. Boron

4. Phosphorus

Q. Manganese is a transition element because:

1. it can change its state without any external energy.
2. it is a rare metal.
3. it can loose and gain electrons.
4. it is highly reactive.