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

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.