Write the names and schematic representation of all the possible dipeptides from alanine, glycine and tyrosine.

Write the names from the description: First three noble gases.

Write the name and symbol of the element from the description. The most reactive nonmetal.

Write the names from the description: The group with valency zero.

Write the name and symbol of the element from the description. The most electronegative atom.

Write the names from the description. Two elements having valency 4.

Write the names and symbols of the constituent elements and identify their valencies from their molecular formula given below: KCl, HBr, MgBr_2, K_2O, NaH, CaCl_2, CCl_4, HI, H_2S, Na_2S, FeS, BaCl_2

Write all possible products for pyrolysis of butane .

Write the names from the description: The period with electrons in the shells K,L and M.