How many half filled orbitals are in a bromine atom a)1 b)4 c)2 d)3

2

Explanation:

each orbital has a maximum of 2 electrons, and there are one 4s and five 3d orbitals, both those subshells are doubly-occupied in each orbital, seeing as how there are 2 electrons in the 4s orbital and 10 in the 3d orbitals.

a electronegativity decreases beacuse the size of nucleus is bigger.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.