The outermost shell of an atom in known as ??

The answer is valance shell.

Valance shell is the outermost shell of an atom which contains valance electrons on it of an atom of an elements.

Hope it helps

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg