General Chemistry - Atomic Structure

Question 1

Protium

Answer 1

Hydrogen atom with 1 p+ (1 amu).

Question 2

Deuterium

Answer 2

Hydrogen atom with 1 p+ and 1 n° (2 amu).

Question 3

Tritium

Answer 3

Hydrogen atom with 1 p+ and 2 n° (3 amu).

Question 4

Atomic Weight

Answer 4

The weighted average of the different isotopes for an element and is on the periodic table.

Question 5

Atomic Mass

Answer 5

Slightly less than the mass of the atom (sum of p+ and n°). (A)

Question 6

Max Planck

Answer 6

Developed the first quantum theory. Proposed that energy emitted as electromagnetic radiation from matter comes in discrete bundles called quanta.

Question 7

Planck’s Relation

Answer 7

E = hf

Question 8

h

Answer 8

6.626 x 10^-34 J s

Question 9

Angular Momentum of an e- Orbiting a H Nucleus Formula

Answer 9

L = (nh)/(2π)

Question 10

Energy of an e- in a H Atom Formula

Answer 10

E = -RH/n^2

Question 11

RH

Answer 11

2.18 x 10^-18 J/electron

Question 12

c

Answer 12

3.00 x 10^8 m/s.

Question 13

Electromagnetic Energy of a Photon Formula

Answer 13

(hc)/λ

Question 14

c Formula

Answer 14

c = fλ

Question 15

Lyman Series

Answer 15

The group of hydrogen emission lines corresponding to transitions from energy levels n >/ 2 to n = 1. Has shorter photon wavelengths in the UV region of the electromagnetic spectrum.

Question 16

Balmer Series

Answer 16

The group of hydrogen emission lines corresponding to transitions from energy levels n >/ 3 to n = 2 and includes four wavelengths in the visible region.

Question 17

Paschen Series

Answer 17

The group of hydrogen emission lines corresponding to transitions from energy levels n >/ 4 to n = 3.

Question 18

Energy Transition Formula

Answer 18

E = (hc)/λ = RH[(1/ni^2) - (1/nf^2)]