Atomic Structure & Periodic Table

Question 1

Protons

Answer 1

1.67x10^-24g (1 amu)

Question 2

Neutrons

Answer 2

1.66x10^-24g (1 amu)

Question 3

1 amu is…

Answer 3

1/12th the mass of C-12

Question 4

Electrons

Answer 4

9.11x10^-28g (0 amu or 1/1837th H+/Proton)

Question 5

Isotopes of hydrogen

Answer 5

Protium= most, 1p 1e
Deuterium= 1p 1n
Tritium= radioactive 1p 2n 1e

Question 6

Average atomic mass (mass spectrometry, isotopes)

Answer 6

Sum of atomic mass of isotope (amu) x percentage (decimal)

Question 7

Wave Particle duality of nature

Answer 7

Electrons and light have properties of waves (wavelength and frequency) and particles (quanta of energy)

Question 8

Properties of ionic

Answer 8

Solid @room temp, no current
Liquid less conductive than metals
High MP and BP, but variations
Low volatility and VP (do not vaporize @room temp)
Brittle under stress
Soluble in water, form electrolytic, solubilities vary

Question 9

Properties of molecular crystals and liquids

Answer 9

Neither liquid or solid conduct electricity
Gas @room temp and atm pressure, solids and liquids are volatile
MP solids low, BP liquids low
Solids soft, wavy consistency
Large energy required to decompose chemically