ACS random
What is the most electronegative element?
Fluorine!!
what is the hybridization for a water molecule
sp3
Draw the CORRECT structure for CH3F...
what is the shape and hybridization of your central atom
shape: tetrahedral
Hybridization: sp3
What charge does the inside of a cell have?
negative
Write a combustion reaction
alkane + O2 ---> water + CO2
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.
What is the formula we use to calculate formal charge?
valence electrons - (lines+dots)
Define Resonance structures
same but different in the sense that delocalization of electrons occurs...aka movement of electrons
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–
in REDOX,
oxidation is...
reduction is...
loss of e-
gain of e-
Which trend defines the energy required to remove one e- from a neutral atom.
Ionization energy
What is the difference between ionic and covalent bonds?
hint* what is happening between the electrons?
ionic = electron donation
covalent = electron sharing
What is the formal charge of the nitrogen atom in ammonium
Who are the CHEM 2 professors for fall 24
Dr. James Becvar
Dr. Mahesh Narayan
when do we use avogrados number and what is the value
dealing with moles, number of particles/molecules
6.022 x 1023u
Arrange the following in order of increasing electronegativity
Arsenic, Carbon, Fluorine, Magnesium
Magnesium, Arsenic, Carbon, Fluorine.
draw the lewis dot structure for ammonium
...
Draw the CORRECT lewis structure for hydronium
what is the molecular shape and hybridization
shape: trigonal pyramidal
hybridization: sp3
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) :)
which instrument is used to measure the gain or loss of heat?
A. manometer
B. hydrometer
C. calorimeter
D. barometer
E.voltmeter
calorimeter
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)
Arrange the following in increasing lattice energy
Sodium Fluoride, Beryllium Sulfide, Lithium Iodide, Magnesium Sulfide.
NaF, LiI, MgS, BeS
Find the molecular geometry, bond angle, and hybridization of hydrogen sulfide. Is it polar?
bent, 109.5 sp3
yes it is polar :)
Which interaction is the strongest
Hydrogen bonding
A. CH4
B. HCN
C. H2CO
D.OF2
B. HCN (hydrogen cyanide)