What type of mixture scatters light and cannot be filtered easily? a colloid, a heterogeneous mixture
a solution, a heterogeneous mixture
a colloid, a homogeneous mixture
a solution, a homogeneous mixture

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.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;