Which type of bond is formed when an atom of potassium transfers an electron to a bromine atoms?
a. metallic
b. ionic
c. nonpolar covalent
d. polar covalent

Answer B) Ionic

Explanation:

Ionic bonds result from the transfer of electrons. Potassium bromide may thus be regarded as K+Br− ;potassium bromide is thus non-molecular.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.