Atomic Spectra

A. band spectrum
B. line spectrum
C. continuous spectrum
D. absorption spectrum

A. three
B. four
C. five
D. six

A. of unknown nature
B. high energy electrons
C. high energy photons
D. radio isotopes

A. its energy levels are too close to each other
B. its energy levels are too far apart
C. it is too small in size
D. it has a single electron

A. 10-10s
B. 10-8s
C. 10-6s
D. 10-9s

A. Balmer series
B. Pfund series
C. Bracket series
D. Lymann series

A. 18.336
B. 1836
C. 18360
D. 183.6