Which one of the following series of lines in the hydrogen spectrum arises from transitions down to n = 2?
A) 121, 102, 97, 95 nm
B) 655, 485, 433, 409 nm
C) 1872, 1279, 1092, 1003 nm
D) 4044, 2620, 2162, 1941 nm

B) 655, 485, 433, 409 nm

Explanation:

655, 485, 433, 409 nm

The greater the energy change involved in a transition, the shorter the wavelength.

Transitions to n = 2 from n = 3, 4, 5 and 6 give lines of wavelength 655, 485, 433 and 409 nm. Other answer choices represent the Lyman. Brackett, and Pfund series.

passing a magnet thought the

mixture , because iron gets attracted to magnet .

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.