Which of the following contains a polar covalent bond?
A. O₂
B. Na(s)
C. NO
D. NaCl

How many orbitals does the p sub shell container

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.

In medium-sized stars such as the sun, nuclear fusion almost always means the fusing of nuclei to form , but larger stars can produce elements as heavy as