What are the possible oxidation numbers of an element if its atomic number is 17?
-1 and 7
-1 and 6
-3 and 5
-2 and 6
Correct answer is A
17 = 2, 8, 7
Which of the following physical properties decreases across the Periodic Table?
Ionization potenial
Electron affinity
Electronegativity
Atomic radius
Correct answer is D
No explanation has been provided for this answer.
20
18
16
2
Correct answer is A
No explanation has been provided for this answer.
coulombic
ionic
covalent
Van der waals
Correct answer is D
No explanation has been provided for this answer.
average velocity of the molecules
number of collisions between the molecules
density of the molecules
free mean path between each molecules and other
Correct answer is B
No explanation has been provided for this answer.