What is the total number of valence electrons in an atom with the electron configuration 2-8-1 ? A) 1
B) 2
C) 8
D) 11

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

In a copper wire, a temperature increase is the result of which of the following