General Chemistry I Exam III Review

Periodic Table

100

Which of the following is the largest? 

O^2-,O, O²⁺

O^2-

200

Rank the elements in increasing size.

Ge, Ba, S, Hg, H

H<S<Ge<Hg<Ba

300

Draw the electron diagram for Aluminum on the board.

If you see this, you were right.

400

What is the electron configuration for Mn?

[Ar]4s²3d⁵

500

What 5 elements have electron configurations that are not what we predict?

Chromium, Copper, Molybdenum, Ruthenium, Polonium

Lewis Structures

100

What is the formula for formal charge?

# of valence electrons from periodic table - # single electrons in Lewis structure - # bonds

200

What is the Lewis structure for Strontium?

.Sr.

300

What is the formal charge on the Sb in the molecule drawn on the board?

+2

400

What is the Lewis structure for CO₂?

If you can see this screen, somebody answered correctly.

500

What is the Lewis structure for SiHI₃?

Woohoo, someone got it!

VSEPR Theory

100

What does "VSEPR" theory stand for?

Valence shell electron pair repulsion theory

200

What is the electronic geometry for C in the molecule ClCH₂F?

Tetrahedral

300

What is/are the bond angles for an atom with seesaw geometry?

<120^o between equatorial and axial positions

<90^o between equatorial positions

400

What is the molecular geometry for an atom with 2 single bonds, a triple bond, and a lone pair?

Trigonal Pyramidal

500

What is the electronic geometry for the molecule with the formula OCCNH?

Linear

Bonds

100

How many pi bonds are in the molecule on the board?

5

200

What is the hybridization for H in the molecule CH₄?

s

300

Label the all bonds on the image on the board as either pi or sigma. Include labels even on bonds that are not explicitly drawn.

Yippee, you got it!

400

What is the hybridization for CH₄?

sp³

500

What is Carbon's hybridization in CHO?

sp²

Quantum Mechanics

100

What type of orbital is shown in the image provided?

f orbital

200

What is/are the possible value(s) of l if n=4?

l = 0,1,2,3

300

A heat lamp produces 17.7 watts of power at a wavelength of 6.5 μm. How many photons are emitted per second?

1.1x10²¹ photons

400

An electron in a hydrogen atom is excited with electrical energy to an excited state with n=2. The atom then emits a photon. What is the value of n for the electron following the emission?

n = 1

500

What is the de Broglie wavelength of an electron traveling at 1.52 × 105 m/s?  

4.79x10^-9 m