WorksheetsChemistry Regents June
Total questions: 29
Worksheet time: 58mins
Which statement describes the charge and location of an electron in atom?
An electron has a positive charge and is located outside the nucleus.
An electron has a positive charge and is located in the nucleus.
An electron has a negative charge and is located outside the nucleus.
An electron has a negative charge and is located in the nucleus
Which statement explains why a xenon atom is electrically neutral?
The atom has fewer neutrons than electrons.
The atom has more protons than electrons.
The atom has the same number of neutrons and electrons.
The atom has the same number of protons and electrons.
If two atoms are isotopes of the same element that atoms must have
the same number of protons and the same number of neutrons.
the same number of protons and a different number of neutrons.
a different number of protons and a different number of neutrons
a different number of protons and a different number of neutrons.
Which electrons in a calcium atom in the ground state have the greatest effect on the chemical properties of calcium?
the two electrons in the first shell
the two electrons in the fourth shell
the eight electrons in the second shell
the eight electrons in the third shell
The weighted average of the atomic masses of the naturally occurring isotopes of an element is the
atomic mass of the element
atomic number of the element
mass number of each isotope
formula mass of each isotope
Which element is classified as a metalloid?
Cr
Cs
Sc
Si
Which statement describes a chemical property of iron?
Iron oxidized.
Iron is a solid at STP
Iron melts.
Iron is attracted to a magnet.
Graphite and diamond are two forms of the same element in the solid phase that differ in their
atomic numbers
crystal structures
electonegativities
empirical formulas
Which ion has the largest radius?
Br-
Cl-
F-
I-
Carbon monoxide and carbon dioxide have
the same chemical properties and the same physical properties
the same chemical properties and different physical properties
different chemical properties and the same physical properties
different chemical properties and different physical properties
Based on Table S, which group on the Periodic Table has the element with the highest electronegativity?
Group 1
Group 2
Group17
Group 18
What is represented by the chemical formula PbCl2 (s) ?
a substance
a solution
a homogeneous mixture
a heterogeneous mixture
What is the vapor pressure of propanone at 50 0 C ?
37 kPa
50 kPa
83 kPa
101 kPa
Which statement describes the charge distribution and the polarity of a CH4 molecule?
The charge distribution is symmetrical and the molecule is nonpolar.
The charge distribution is asymmetrical and the molecules is nonpolar.
The charge distribution is symmetrical and the molecule is polar.
The charge distribution is asymmetrical and the molecule is polar.
In a laboratory investigation a student separates colored compounds obtained from a mixture of crushed spinach leaves and water by using paper chromatography. The colored compounds separate because of differences in
molcular polarity
malleability
boiling point
electrical conductivity
Which phrase describes the motion and attractive forces of ideal gas particles?
random straight-line motion and no attractive forces
random straight-line motion and strong attractive forces
random curved-line motion and no attractive forces
random curved-line motion and strong attractive forces
At which temperature will Hg (l) and Hg (s) reach equilibrium in a closed system at 1.0 atmosphere?
234 K
273 K
373 K
630 K
A molecule of any organic compound has at least one
ionic bond
double bond
oxygen atom
carbon atom
A chemical reaction occurs when reactant particles
are separated by great distances
have no attractive forces between them
collide with proper energy and proper orientation
convert chemical energy into nuclear energy
Systems in nature tend to undergo changes toward
lower energy and lower entropy
lower energy and higher entropy
higher energy and lower entropy
higher energy and higher entropy
Which formula can represent an alkyne?
C2H4
C2H6
C3H4
C3H6
Which energy conversion occurs in an operating voltaic cell
chemical energy to electrical energy
chemical energy to nuclear energy
electrical energy to chemical energy
electrical energy to nuclear energy
Which process requires energy to decompose a substance?
electrolysis
neutralization
sublimation
synthesis
The concentration of which ion is increased when LiOH is dissolved in water?
hydroxide ion
hydrogen ion
hydronium ion
halide ion
Which equation represents neutralization?
6Li (s) + N2 (g) --> 2 Li3N (s)
2Mg (s) + O2 (g) --> 2 MgO (s)
2KOH (aq) + H2SO4 (aq) --> K2SO4 (aq) + 2H2O (l)
Pb(NO3)2 (aq) + K2CrO4 (aq) --> 2KNO3 (aq) + PbCrO4 (s)
The stability of an isotope is related to its ratio of
neutrons to positrons
neutrons to protons
electrons to positrons
electrons to protons
Which particle has the least mass?
alpha particle
beta particle
neutron
proton
The energy released during a nuclear reactions is a result of
breaking chemical bonds
forming chemical bonds
mass being converted to energy
energy being converted to mass
The use of uranium-238 to determine the age of a geological formation is a beneficial use of
nuclear fusion
nuclear fission
radioactive isomers
radioactive isotopes
