Exam 4 Review!

ACS random

100

What is the most electronegative element?

Fluorine!!

200

in what respect does an atom of Mg differ from a Mg ion (Mg2+)?

(A)The ion has a more stable electronic arrangement than the atom.

(B)The positive charge on the nucleus of the ion is two units greater than the nuclear charge on the atom.

(C)The ion has two more protons than the atom.

(D)The ion will react more readily with free Cl2.

(E)The ion has two more planetary electrons than the atom.

(A)The ion has a more stable electronic arrangement than the atom.

300

Which trend defines the energy required to remove one e- from a neutral atom.

Ionization energy

400

Arrange the following in order of increasing electronegativity 

Arsenic, Carbon, Fluorine, Magnesium

Magnesium, Arsenic, Carbon, Fluorine.

500

The atomic mass of an element is 32.07 u and its atomic number is 16. The number of protons contained in the nucleus of an atom of this element is 

(A) 16 (B) 31 (C) 32 (D) 48

A (atomic #= #protons)

Module 13

100

what is the hybridization for a water molecule

sp3

200

What is the formula we use to calculate formal charge?

valence electrons - (lines+dots) 

300

What is the difference between ionic and covalent bonds? 

hint* what is happening between the electrons?

ionic = electron donation 

covalent = electron sharing 

400

draw the lds for ammonium

...

500

Arrange the following in increasing lattice energy 

Sodium Fluoride, Beryllium Sulfide, Lithium Iodide, Magnesium Sulfide. 

NaF, LiI, MgS, BeS

Module 14

100

Draw the CORRECT structure for CH3F...

what is the shape and hybridization of your central atom

shape: tetrahedral 

Hybridization: sp3

200

Define Resonance structures 

same but different in the sense that delocalization of electrons occurs...aka movement of electrons

300

What is the formal charge of the nitrogen atom in ammonium

+1

400

Draw the CORRECT lewis structure for hydronium 

what is the molecular shape and hybridization

shape: trigonal pyramidal

hybridization: sp3

500

Find the molecular geometry, bond angle, and hybridization of hydrogen sulfide. Is it polar?

bent, 109.5 sp³

yes it is polar :)

Miscellaneous Chemistry

100

What charge does the inside of a cell have?

negative

200

The atomic mass of an element is 32.07 u and its atomic number is 16. The element forms a simple ion. The ion will most likely have a charge of

(A) 1– 

(B) 2–

(C) 3+ 

(D) 1+

B. 2–

300

Who are the CHEM 2 professors for fall 24

Dr. James Becvar 

Dr. Mahesh Narayan 

400

Which pair of elements is most likely to react to form a covalently bonded species? 

(A) P and O (B) Ca and O (C) K and S (D) Zn and C

A. P and O

nm+nm! Remember from stairway (metalloids) to right are NM and to left are M (minus Hydrogen) :)

500

Which interaction is the strongest 

Hydrogen bonding 

past modules

100

Write a combustion reaction

alkane + O2 ---> water + CO2 

200

in REDOX, 

oxidation is...
reduction is...

loss of e-

gain of e-

300

when do we use avogrados number and what is the value

dealing with moles, number of particles/molecules

6.022 x 10²³u

400

which instrument is used to measure the gain or loss of heat?

A. manometer

B. hydrometer

C. calorimeter

D. barometer

E.voltmeter

calorimeter

500

An sp hybridized central atom can be used to describe the bonding in :

A. CH₄

B. HCN

C. H₂CO

D.OF₂

B. HCN (hydrogen cyanide)