Which from following is a CORRECT decreasing order of ionization enthalpies of different elements?

What is the position of transition elements from $$\mathrm{Sc}$$ to $$\mathrm{Zn}$$ in long form of periodic table?

Which group elements from following are called as chalcogens?

Identify the element having general electronic configuration $$\mathrm{ns}^2 \mathrm{np}^4$$ from following.

Identify amphoteric oxide from following.