Which electron in an atom (Z=17) is the most shielded from nuclear charge?
A. an electron in the 2s B. an electron in the 3p
C. an electron in the 3d D. an electron in the 1s

Explain why scientists use shared characteristics to make cladograms.

How are isotopes of the same chemical element alike? how are they different?

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.