ACS CHEMISTRY FINAL EXAM 2
According to the Lewis definition, an acid is a species that _____________ a pair of
electrons - Correct Answers -accepts
A system of two nuclei where each atom donates one electron to the other atom is
called a ______________ bond - Correct Answers -covalent
Reactant molecules are forming products as fast as ____________ are reacting to form
reactants - Correct Answers -product molecules
Chemical equilibrium is the result of ___________ reactions attaining equal speeds. -
Correct Answers -opposing
A ________ is directly used to determine the relative masses of atoms? - Correct
Answers -Mass Spectrograph
The mechanism of electrical conduction in metals is dependent on the _____________
of valence electrons. - Correct Answers -movement
Ionic substances are generally extremely __________. - Correct Answers -fast
Characteristics of Ionic Substances - Correct Answers --They conduct an electric
current when fused.
-Those having a common ion exhibit some similar chemical properties.
-They lower the vapor pressure of water when dissolved in it.
-They raise the boiling point of water when dissolved in it.
Adding a ______ will lower the activation energy for a particular reaction? - Correct
Answers -catalyst
A catalyst reduces the activation energy for a reaction and increases the ______ of a
reaction. - Correct Answers -rate
A ___________ instrument is used to measure the gain or loss of heat? - Correct
Answers -Calorimeter
,Incandescent carbon particles cause a gas flame to be _______. To obtain a hotter blue
flame you should _______ the air holes. - Correct Answers -yellow open
Which group of ions can exist together in water solution in moderate concentration? -
Correct Answers -K+, Cl-, Na+, NO3-
Entropy decreases in what process? - Correct Answers -freezing water
When equal volumes of 0.1 M solutions of HCl and NaOH are mixed, the total number
of ions present will be approximately ______________ as great as before. - Correct
Answers -Half
Oxygen and ozone have the formulas O2 and O3 respectively are - Correct Answers -
Allotropes
True/ False: Protons and neutrons have most of the mass of an atom and occupy the
MOST amount of volume. - Correct Answers -False.
This is equivalent to the number of protons in atom - Correct Answers -Atomic Number
___________________ refers to two atoms, ions or molecules that have the same
electronic structure and same number of valence electrons. - Correct Answers -
Isoelectronic
The nucleus of an atom contains _____ & ______. - Correct Answers -Protons
Neutrons
What is the range of visible light? - Correct Answers -450-750nm
High energy means _______ frequency & _______ wavelength - Correct Answers -high
short
True/False: The atomic number of an element is the number of protons in one atom. -
Correct Answers -True
True/False: The number of electrons outside the nucleus is the same number of
neutrons in the nucleus. - Correct Answers -False
Electron shells, energy levels or orbits of the atom is called ________ Electrons -
Correct Answers -Planetary
An inert gas is any gas that is not reactive with elements. Typically the ________
elements - Correct Answers -noble
An atom or group of atoms that has gained or lost one or more electrons, thus acquiring
a charge is called an __________. - Correct Answers -Ion
, Arrangement of electrons in the orbitals of an atom. - Correct Answers -Electron
Configuration
2 different molecules that have the same molecular formula, but have different structure
arrangement.
A compound that exists in forms having different arrangements of atoms but same
molecular weight
Two molecules that are composed of the same type and number of elements but are
arranged in different ways and have different properties are called - Correct Answers -
Isomer
Different forms of the same element; have different properties due to different
arrangements of the atoms (e.g., graphite, diamond, bucky-ball) is called
____________. - Correct Answers -allotrope
A long molecule consisting of many similar or identical building blocks linked by
covalent bonds is called a _________. - Correct Answers -polymer
Atoms of the same element that have different numbers of neutrons is called an
_____________. - Correct Answers -isotope
________________ consist of two protons and two neutrons bound together into a
particle. - Correct Answers -Alpha Particles
An atom with an atomic#: 84 and a mass#: 199 emits an alpha particle. The residual
atom after this change has an atomic number of ______ and a mass# of _____. -
Correct Answers -82 195
In effecting nuclear changes by bombarding target nuclei with the positively charged
alpha particles, it is necessary to accelerate these particles to high speed because it is
necessary to _______ the force of repulsion of the nucleus. - Correct Answers -
overcome
Millikan determined the _____________ of the charge on an electron. - Correct
Answers -magnitude
At which period does the d-orbital begin? - Correct Answers -3
If the d-orbital begins at Period 3, do I still use (4s^2) for the electron configuration of an
element in the d-orbital?
Example: Cr--> (1s^2)(2s^2)(2p^6)(3s^2)(3p^6)(4s^2)(3d^4) - Correct Answers -Yes
According to the Lewis definition, an acid is a species that _____________ a pair of
electrons - Correct Answers -accepts
A system of two nuclei where each atom donates one electron to the other atom is
called a ______________ bond - Correct Answers -covalent
Reactant molecules are forming products as fast as ____________ are reacting to form
reactants - Correct Answers -product molecules
Chemical equilibrium is the result of ___________ reactions attaining equal speeds. -
Correct Answers -opposing
A ________ is directly used to determine the relative masses of atoms? - Correct
Answers -Mass Spectrograph
The mechanism of electrical conduction in metals is dependent on the _____________
of valence electrons. - Correct Answers -movement
Ionic substances are generally extremely __________. - Correct Answers -fast
Characteristics of Ionic Substances - Correct Answers --They conduct an electric
current when fused.
-Those having a common ion exhibit some similar chemical properties.
-They lower the vapor pressure of water when dissolved in it.
-They raise the boiling point of water when dissolved in it.
Adding a ______ will lower the activation energy for a particular reaction? - Correct
Answers -catalyst
A catalyst reduces the activation energy for a reaction and increases the ______ of a
reaction. - Correct Answers -rate
A ___________ instrument is used to measure the gain or loss of heat? - Correct
Answers -Calorimeter
,Incandescent carbon particles cause a gas flame to be _______. To obtain a hotter blue
flame you should _______ the air holes. - Correct Answers -yellow open
Which group of ions can exist together in water solution in moderate concentration? -
Correct Answers -K+, Cl-, Na+, NO3-
Entropy decreases in what process? - Correct Answers -freezing water
When equal volumes of 0.1 M solutions of HCl and NaOH are mixed, the total number
of ions present will be approximately ______________ as great as before. - Correct
Answers -Half
Oxygen and ozone have the formulas O2 and O3 respectively are - Correct Answers -
Allotropes
True/ False: Protons and neutrons have most of the mass of an atom and occupy the
MOST amount of volume. - Correct Answers -False.
This is equivalent to the number of protons in atom - Correct Answers -Atomic Number
___________________ refers to two atoms, ions or molecules that have the same
electronic structure and same number of valence electrons. - Correct Answers -
Isoelectronic
The nucleus of an atom contains _____ & ______. - Correct Answers -Protons
Neutrons
What is the range of visible light? - Correct Answers -450-750nm
High energy means _______ frequency & _______ wavelength - Correct Answers -high
short
True/False: The atomic number of an element is the number of protons in one atom. -
Correct Answers -True
True/False: The number of electrons outside the nucleus is the same number of
neutrons in the nucleus. - Correct Answers -False
Electron shells, energy levels or orbits of the atom is called ________ Electrons -
Correct Answers -Planetary
An inert gas is any gas that is not reactive with elements. Typically the ________
elements - Correct Answers -noble
An atom or group of atoms that has gained or lost one or more electrons, thus acquiring
a charge is called an __________. - Correct Answers -Ion
, Arrangement of electrons in the orbitals of an atom. - Correct Answers -Electron
Configuration
2 different molecules that have the same molecular formula, but have different structure
arrangement.
A compound that exists in forms having different arrangements of atoms but same
molecular weight
Two molecules that are composed of the same type and number of elements but are
arranged in different ways and have different properties are called - Correct Answers -
Isomer
Different forms of the same element; have different properties due to different
arrangements of the atoms (e.g., graphite, diamond, bucky-ball) is called
____________. - Correct Answers -allotrope
A long molecule consisting of many similar or identical building blocks linked by
covalent bonds is called a _________. - Correct Answers -polymer
Atoms of the same element that have different numbers of neutrons is called an
_____________. - Correct Answers -isotope
________________ consist of two protons and two neutrons bound together into a
particle. - Correct Answers -Alpha Particles
An atom with an atomic#: 84 and a mass#: 199 emits an alpha particle. The residual
atom after this change has an atomic number of ______ and a mass# of _____. -
Correct Answers -82 195
In effecting nuclear changes by bombarding target nuclei with the positively charged
alpha particles, it is necessary to accelerate these particles to high speed because it is
necessary to _______ the force of repulsion of the nucleus. - Correct Answers -
overcome
Millikan determined the _____________ of the charge on an electron. - Correct
Answers -magnitude
At which period does the d-orbital begin? - Correct Answers -3
If the d-orbital begins at Period 3, do I still use (4s^2) for the electron configuration of an
element in the d-orbital?
Example: Cr--> (1s^2)(2s^2)(2p^6)(3s^2)(3p^6)(4s^2)(3d^4) - Correct Answers -Yes
