Two parrots have different parents. One parrot has red chest feathers, and the other parrot has yellow chest feathers. Why do the parrots have different feather
colors on their chest?

a. Each parrot has different feather colors because offspring from different parents will
have different feather colors

b. Each parrot has different feather colors because they have different versions of the
gene for feather color that connect together to make different feather colors.

c. The parrots have different versions of the gene for feather color, and the genes are
different colors in each parrot's feathers.

d. The parrots have different versions of the gene for feather color, which instruct for
different proteins that connect in different ways to make different feather colors.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.