NEW
Font size
WorksheetsChemistry Unit 3 Pre-Assessment
Total questions: 20
Worksheet time: 3600secs
The ions in most ionic compounds are organized into a
molecule
crystal lattice
Lewis Structure
polyatomic ion
Ionic compounds are formed by ionic bonds between
metals and metals
transition metals
nonmetals and nonmetals
metals and nonmetals
metals and nonmetals
metallic bonds
ionic bonds
covalent bonds
polyatomic ions
Which of the following atom’s Lewis dot notation shows six valence electrons?
nitrogen
magnesium
sulfur
iodine
How many electrons do strontium atoms generally lose?
0
1
2
3
Cesium has an electronegativity value of 0.7 and fluorine has and electronegativity value of 4.0. Which of the following statements is true?
Cesium has less of a tendency to attract electrons than fluorine.
Fluorine repels electrons more than cesium.
Cesium attracts electrons easier than fluorine.
Fluorine has less of a tendency to attract electrons than cesium.
If atoms that share electrons, have an unequal attraction for the electrons, the bond is called
ionic
polar
nonpolar
metallic
The melting points of ionic compounds are higher than the melting points of molecular compounds because
ionic compounds are brittle.
attractive forces between ions are stronger than the attractive forces between molecules.
Ionic substances are all flammable.
none of the above
Which of these compounds would have the highest melting point?
NH3
OF2
H2O
NaCl
The VSEPR theory is a model for predicting...
the strength of metallic bonds.
the shape of molecules.
lattice energy.
ionization energy.
The chemical formula for water is H2O. This formula is an example of a(n)
Lewis Structure
formula unit
molecular formula
ionic formula
Which of the following molecules has a single covalent bond?
F2
CO2
N2
NO
Which of the following molecules has a single lone pair of electrons?
HCl
CH4
H2O
NH3
What is the molecular shape for carbon tetrachloride, CCl4.
square
tetrahedral
trigonal planar
trigonal pyramidal
Which of the properties listed below is NOT a property of ionic compounds?
hardness
brittle
low melting point
high melting point
A covalent bond between two different atoms in which the bonding electrons are not shared equally is a
polar bond
nonpolar bond
ionic bond
hydrogen bond
Which of the following is the correct Lewis structure for hydrogen chloride, HCl?
Determine the Lewis Structure for the nitrate ion, NO3−
, Then, predict its molecular geometry.
tetrahedral
trigonal planar
bent
linear
The electrons involved in the formation of a chemical bond are called
dipoles.
s block electrons.
Lewis electrons.
valence electrons.
When drawing a Lewis Structure, the central atom is generally the
atom with the fewest electrons.
atom with the least electronegativity.
atom with the highest atomic number.
atom with the most electrons.
