Time period of revolution of an electron in nth orbit in a hydrogen like atom is given by T =
Tona
. Z
Zb
= atomic number
(1) To = 1.5 * 10-16 s, a = 3
(2) T. = 6.6 x 1015 s, a = 3
(3) To = 1.51 * 10-16 s, b = 3
(4) T. = 6.6 x 1015 s, b = 3

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge