Chem 1211 Unit 1 Major Review!

Experimental Results, Unit Conversions, Dimensional Analysis

100

Count the number of significant figures in this value: 5049.6

5 sig figs.

200

Convert 3.98 cm to km.

3.98 x 10^-5 km

300

How many meters is 925.7 inches?

23.51 meters

400

What is the volume of a 94.3 g piece of aluminum? The density of aluminum is 2.70 g/mL.

34.9 mL

500

Convert 42.7 cm² to in².

6.62 in²

Subatomic Particles, Isotopes, and the Periodic Table

100

Is argon (Ar, number 18) a metal, nonmetal, or metalloid?

nonmetal

200

Is Antimony (Sb, number 51) on the periodic table a metal, nonmetal, or metalloid?

Metalloid

300

What is the number of protons, neutrons, and electrons in this nuclide? ₂₉⁶⁵Cu

29 protons, 36 neutrons, 29 electrons.

400

How many protons and neutrons are in the isotope ⁷⁹₃₅Br?

35 protons

44 neutrons

500

How many protons, neutrons, and electrons are in this ion?     ₂₆⁵⁷Fe²⁺

26 protons, 31 neutrons, 24 electrons

Atomic Spectra & Electromagnetic Spectrum

100

What is the frequency (in Hz) of a red laser light that has a wavelength of 679 nm? c = λv

4.42 x 10¹⁴ Hz

200

An X-ray has a frequency of 2.71 x 10¹⁷ Hz. What is its wavelength (in meters)? 

c = λv

1.11 x 10^-9 meters

300

What is the energy (in J) of a photon of violet light with a frequency of 7.2 x 10¹⁴ Hz? (E_photon = hv. h = 6.626 x 10^-34 J · s)

E_photon = 4.8 x 10^-19 J

400

What is the energy (in J) of a single orange photon with a wavelength of 597 nm? (E_photon = hc/λ) (h= 6.626 x 10^-34 J x s) (c = 2.998 x 10⁸ m/s)

3.33 x 10^-19 J

500

Calculate the wavelength of light (in nm) of the hydrogen line spectrum for a transition from n=4 to n=1. 

1/λ = R_H(1/n²_f - 1/n²_i)

R_H = 1.097 x 10⁷ m^-1

97.2 nm

Orbitals and Electron Configuration

100

What is the shape of a d orbital?

Double-dumbbell.

200

How many orbitals does a p subshell have?

3 orbitals.

300

What is the maximum number of orbitals can there be in a shell with principal quantum number n = 3?

9 orbitals.

400

Write the electron configuration for Carbon, number 14.

1s²2s²2p²

500

Write the noble gas electron configuration for zirconium (Zr, number 40).

[Kr] 5s²4d²

Electron Configuration, cont'd, Trends

100

Does Rb or Na have a larger atomic radius?

Rb (Rubidium)

200

Write the electron configuration for Mg^2+.

1s²2s²2p⁶

300

Write the noble gas configuration for Cr^3+.

[Ar] 3d³

400

How many unpaired electrons are in the ground-state electron configuration for sulfur?

2 unpaired electrons!

500

How many unpaired electrons are in the ground-state electron configuration for krypton? (Kr, #36)

No unpaired electrons :) All are paired.