Which types of orbitals are found in the principal energy level n = 2? O A.
S
OB.
s, f
O C. S. d
O D.
Sp
E.
s, p, d

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5