Why can't all the mixtures be classified as solutions? a. not all mixtures are heterogeneous b. not all mixtures are homogeneous c. not all mixtures have solutes and solvents d. mixtures are made of only one substance.

C because A solution is a homogenous mixture at the molecular or ionic level of two or more pure substances that do not react with each other, whose components are in variable proportions.1 2 It can also be defined as a homogeneous mixture formed by a solvent and for one or several solutes. Again :V

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

can you attach the