CHEM 120 UNIT 2 (Latest Update) Questions and Verified
How many covalent bonds does the element Ar (#18) usually form? - ANSWER-none
How many covalent bonds does the element O (#8) usually form? - ANSWER-2
When a metal loses electrons and bonds to a nonmetal which gains electrons, the resulting compound is
considered: - ANSWER-ionic
Fluorine is a nonmetal with a very high electronegativity. Sodium is a metal with very low
electronegativity. A bond between sodium and fluorine would be classified as: - ANSWER-ionic
In a nonpolar covalent bond, - ANSWER-covalent electrons are shared equally between two nonmetal
atoms
How are electrons transferred between sodium and fluorine atoms to form sodium fluoride? - ANSWER-
sodium loses one electron and fluorine gains the one electron
What is the correct formula for potassium phosphide? - ANSWER-K3P
The correct name for MgO is - ANSWER-magnesium oxide
The correct formula for iron (III) sulfide is - ANSWER-Fe2S3
The correct name for SrCl2 is - ANSWER-strontium chloride
How many nonbonding pairs are present in ammonia, NH3? - ANSWER-1
Answers| 100% Correct| Grade A
The correct formula for a compound between Ba and O is: - ANSWER-BaO
, The correct formula for a compound between Al and P is: - ANSWER-AlP
The correct formula for a compound between Na and N is: - ANSWER-Na3N
The correct formula for a compound between Mg and O is: - ANSWER-MgO
element - ANSWER-cannot be broken down
Elements are chemically the simplest substances and hence cannot be broken down using chemical
reactions. Elements can only be changed into other elements using nuclear methods.
atom - ANSWER-smallest component of an element
compound - ANSWER-two or more elements chemically combined.
Ex: H20, sugar, exhaled air
mixture - ANSWER-variable, retains identity, but mixes
homogeneous mixture - ANSWER-same composition throughout
ex: creamy peanut butter
heterogeneous mixture - ANSWER-different composition throughout
ex: chunky peanut butter, chicken noodle soup
Describe the organization of the periodic table. - ANSWER-groups are vertical, periods are horizontal,
measured by metals, transition metals, nonmetals, and metalloids
State the octet rule. - ANSWER-atoms will gain, lose, or share electrons in order to achieve 8
ionic compound - ANSWER-metal to nonmetal
How many covalent bonds does the element Ar (#18) usually form? - ANSWER-none
How many covalent bonds does the element O (#8) usually form? - ANSWER-2
When a metal loses electrons and bonds to a nonmetal which gains electrons, the resulting compound is
considered: - ANSWER-ionic
Fluorine is a nonmetal with a very high electronegativity. Sodium is a metal with very low
electronegativity. A bond between sodium and fluorine would be classified as: - ANSWER-ionic
In a nonpolar covalent bond, - ANSWER-covalent electrons are shared equally between two nonmetal
atoms
How are electrons transferred between sodium and fluorine atoms to form sodium fluoride? - ANSWER-
sodium loses one electron and fluorine gains the one electron
What is the correct formula for potassium phosphide? - ANSWER-K3P
The correct name for MgO is - ANSWER-magnesium oxide
The correct formula for iron (III) sulfide is - ANSWER-Fe2S3
The correct name for SrCl2 is - ANSWER-strontium chloride
How many nonbonding pairs are present in ammonia, NH3? - ANSWER-1
Answers| 100% Correct| Grade A
The correct formula for a compound between Ba and O is: - ANSWER-BaO
, The correct formula for a compound between Al and P is: - ANSWER-AlP
The correct formula for a compound between Na and N is: - ANSWER-Na3N
The correct formula for a compound between Mg and O is: - ANSWER-MgO
element - ANSWER-cannot be broken down
Elements are chemically the simplest substances and hence cannot be broken down using chemical
reactions. Elements can only be changed into other elements using nuclear methods.
atom - ANSWER-smallest component of an element
compound - ANSWER-two or more elements chemically combined.
Ex: H20, sugar, exhaled air
mixture - ANSWER-variable, retains identity, but mixes
homogeneous mixture - ANSWER-same composition throughout
ex: creamy peanut butter
heterogeneous mixture - ANSWER-different composition throughout
ex: chunky peanut butter, chicken noodle soup
Describe the organization of the periodic table. - ANSWER-groups are vertical, periods are horizontal,
measured by metals, transition metals, nonmetals, and metalloids
State the octet rule. - ANSWER-atoms will gain, lose, or share electrons in order to achieve 8
ionic compound - ANSWER-metal to nonmetal
