Atom X has 17 protons. How many electrons are in its valence shell (outermost energy level)? A. 7
B.3
C.5
D.10

Atom C has 17 protons, and since it is stated in the question that it's an atom, not an ion so it will have same number of electrons as protons, so that the atom will be electrically neutral.

now,

since, last shell is M shell... So, number of electrons in its valence shell (outermost energy level) is 7 electrons

answer; i do believe that the correct answer is; ///mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis;