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WorksheetsAbout to Crush This Chemistry Regents!
Total questions: 54
Worksheet time: 2hrs 51mins
Charge of an electron
negative charge
positive charge
neutral
Location of an electron
outside the nucleus
inside the nucleus
Why is an atom neutral?
same number of protons and electron
fewer neutrons than electrons
more protons than electrons
Isotopes
same number of protons and a different number of neutrons
same number of protons and the same number of neutrons
Which electrons in a calcium atom have the greatest effect on the chemical properties of calcium?
the 2 electrons in the fourth shell
the 2 electrons in the first shell
the 8 electrons in the second shell
The weighted average of the atomic masses of the naturally occurring isotopes of an element is the
atomic mass
atomic number
mass number
formula mass
Identify the metalloid
Cr
Cs
Si
Identify a CHEMICAL property of iron
Iron oxidizes
Iron is solid at STP
Iron melts
Iron is attracted to a magnet
Graphite and diamond are two forms of the same element that DIFFER in their
atomic numbers
crystal structures
electronegativities
empirical formulas
Which has a larger radius?
Br-
I-
Carbon monoxide and carbon dioxide have
same chemical properties and same physical properties
same chemical properties and different physical properties
different chemical properties and the same physical properties
different chemical properties and different physical properties
Which group has the highest electronegavity?
Group 1
Group 3
Group 17
What is represented by the chemical formula PbCl2 (s)?
a substance
a solution
a homogeneous mixture
a heterogenous mixture
What is the vapor pressure of propanone at 50ºC?
37 kPa
83 kPa
101 kPa
What is the charge distribution and polarity of a CH4 molecule?
the charge distribution is symmetrical and the molecule is nonpolar
the charge distribution is asymmetrical and the molecule is polar
Colored compounds in paper chromatography separate based on differences in
polarity
temperature
Ideal gas particles
random straight-line motion
no attractive forces
random curve-line motion
Temperature at which Hg(l) and Hg(s) reach equilibrium
234K
273K
An organic compound has at least one
oxygen atom
carbon atom
hydrogen aton
A chemical reaction occurs when the reactants
are separated by large distances
have no attractive forces
collide with proper energy and orientation
Systems tend to undergo changes towards
lower entropy and lower energy
lower energy and higher entropy
higher energy and lower entropy
higher energy and higher entropy
Which one is an alkyne?
C2H4
C2H6
C3H4
Which one is an isomer of this compound?
Which energy conversion occurs in a voltaic cell?
chemical to electrical energy
electrical energy to chemical energy
The concentration of which ion is increased when LiOH is dissolved in water?
hydroxide ion
hydrogen ion
hydroniun ion
Which equation is neutralization?
The stability of an isotope is related to its ratio of
neutrons to protons
electrons to protons
Which particle has the least mass?
alpha particle
beta particle
The energy released during a nuclear reaction is a result of
breaking chemical bonds
forming chemical bonds
mass being converted to energy
The use of uranium-238 to determine the age of a geological formation is a beneficial use of
nuclear fusion
radioactive isomers
radioactive isotopes
Which elements are present in this mixture?
A
D
X
Z
Each line in the spectra represent the energy
released as an electron moves from a lower energy state to a higher energy state
released as an electron moves from a higher energy state to a lower energy state
Which ion has a charge of 2-?
A
E
G
J
What is the approximate mass of an atom that contains 26 protons, 26 electrons and 19 neutrons?
26u
45u
Which electron configuration represents a potassium atom in an excited state?
2-8-8-1
2-8-7-2
What is the total number of neutrons in an atom of K-42?
23
42
What is the number of moles of C that must completely react to produce 2.0 moles of C2H6?
3.0 mol
4.0 mol
Which type of chemical reaction is represented by the equation?
single replacement
double replacement
synthesis
decomposition
Based on this table, which statement describes how two of these elements can be differentiated from each other?
Sodium can be differentiated from tungsten based on conductivity
Sodium can be differentiated from iodine based on malleability.
Which particle diagram represents a mixture?
1
2
3
4
An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity?
carbon
fluorine
oxygen
What is the concentration of an aqueous solution that contains 1.5 moles of NaCl in 500. milliliters of this solution?
3.0 M
7.5 M
Which two gas samples contain the same number of molecules?
II and III
II and IV
Based on Table I, what is the ΔH value for the production of 1.00 mole of NO2(g) from its elements at 101.3 kPa and 298 K?
+33.2 KJ
-33.2 KJ
+132.8 KJ
Which equation represents an addition reaction?
In this reaction, each Ni atom
loses 1 electron
loses 2 electrons
gains 2 electrons
Which equation represents a reduction half reaction?
During this reaction, electrons are transferred from
Which metal reacts spontaneously with Sr2+ ions?
Ca(s)
Cs(s)
Cu(s)
The water molecule acts as a base because it
donates an H+
accepts an H+
State the general trend in first ionization energy as the elements in Period 3 are considered from left to right
Ionization energy increases.
Ionization energy decreases
Identify a type of strong intermolecular force that exists between water molecules, but does not exist between carbon dioxide molecules.
hydrogen bonding
covalent bonding
A structural formula for 2-butanol
In terms of element classification, why silver chloride is an ionic compound
Silver is a metal and chlorine is a nonmetal.
transfer of electrons
