Please explain if the following are true or false and how you got your answer. A
ID: 1069753 • Letter: P
Question
Please explain if the following are true or false and how you got your answer.
A. When comparing Lithium, sodium and oxygen, lithium has the largest second ionization energy.
B. According to the postulates of kinetic-molecular theory, the molecules of all gases at a given
temperature have the same average speed.
C. Bond angles of 180° only occur around atoms which display linear molecular geometry.
D. According to valence bond theory, overlap of bonding orbitals of atoms will weaken a bond, dueto electron-electron repulsion.
Explanation / Answer
A) True
Li+ = 1s2 = [He]
Na+ = 1s2 2s2 2p6 = [Ne]
O+ = 1s2 2s2 2p3
From top to bottom, ionization energy decreases.
Therefore, lithium has the largest second ionization energy.
B) False
At a given temperature, all gases have same avearge kinetic energy.
c) True
d) False