2 - Atomic Structure

Question 1

mass spectrometer

Answer 1

used to determine the relative atomic mass of an element from its isotopic composition by deflecting positive charged gaseous ions using an electric or magnetic field

Question 2

relative atomic mass

Answer 2

weighed mean of the naturally occurring isotopes of the element relative to 1/12 of carbon-12

Question 3

emission spectra at n=1

Answer 3

Lyman series - produces ultraviolet light. higher energy, shorter wavelength, higher frequency

Question 4

emission spectra at n=2

Answer 4

Balmer series - the visible part of the spectrum

Question 5

emission spectra at n=3

Answer 5

Paschen Series - produces infrared light. lower energy, loader wavelength, shorted frequency

Question 6

how does hydrogen give evidence that for the existence of electrons in discrete energy levels, which converge at higher energies.

Answer 6

hydrogen has an emission spectrum in the paschen, Balmer and Lyman regions. the visible end of the emission spectrum converges towards higher frequencies of the blue light. electron fall to n=1 uv light is emitted, at n=3, ir light is emitted.

Question 7

orbital

Answer 7

2 electrons that spin in opposite directions

Question 8

continuous spectrum

Answer 8

only all the colours

Question 9

line spectrum

Answer 9

black with lines of colour seen. the lines allow the continuous spectrum to energy

Question 10

converging towards (in terms of emission spectrum)

Answer 10

what direction the lines on the line spectrum move closer together

Question 11

Pauli Exclusion

Answer 11

two electrons per orbital that spin in opposite direction

Question 12

Aufbau Principle

Answer 12

fill the sub-shells from lowest energy increasing

Question 13

Hund rule

Answer 13

‘bus seating’ half full sub shell before pairing electrons