Chapter 3 arrangement of electrons

Question 1

Emission line spectrum

Answer 1

A series of lines emitted when an electric current is passed through a gas ( hydrogen ,sodium mercury)

Question 2

Colors given off by metals : 1= lithium 2= potassium 3= barium 4= strontium 5= copper 6= sodium

Answer 2

1= crimson 2= lilac 3= green 4= red 5= blue-green 6= yellow

Question 3

Energy value

Answer 3

defined as the fixed energy value that an electron in an atom may have

Question 4

Ground state

Answer 4

of an atom is one in which the electrons occupy the lowest available energy levels

Question 5

Excited state

Answer 5

of an atom is one in which the electrons occupy higher energy levels than available in the ground state

Question 6

E2 - E1 = hf ( meaning)

Answer 6

E2 = higher energy level , E1= lower energy level , h= planck’s constant , f= frequency of light emitted

Question 7

Atomic absorption spectrometry (aas)

Answer 7

dark lines against a colored background ( opp. of emission spec.)

Question 8

Uses of AAS

Answer 8

forensic science eg gunshot residue

Question 9

Heisenberg’s uncertainty principal

Answer 9

that it is impossible to measure at the same time both the velocity and position of an electron

Question 10

Orbital =

Answer 10

region in space where it is highly probable that you will find an electron

Question 11

shape of orbitals: s, p, d

Answer 11

sphere, dumbell, 2 perpendicular dumbbells

Question 12

sublevel

Answer 12

subdivision of an energy level consists of one or more orbitals of the same energy

Question 13

3 series and where found

Answer 13

Paschen series , found in infrared region . Balmer series, visible. Lyman series , found in ultraviolet region