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WorksheetsChemistry Regent - June 2015 Q1-10
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Compared to an electron, which particle has a charge that is equal in magnitude but opposite in sign?
a)
an alpha particle
b)
a beta particle
c)
a proton
d)
a neutron
2.
The mass of a proton is approximately equal to
a)
1 atomic mass unit
b)
12 atomic mass units
c)
the mass of 1 mole of carbon atoms
d)
the mass of 12 moles of electrons
3.
Which property decreases when the elements in Group 17 are considered in order of increasing atomic number?
a)
atomic mass
b)
melting point
c)
atomic radius
d)
electronegativity
4.
Any substance composed of two or more elements that are chemically combined in a fixed proportion is
a)
an isomer
b)
an isotope
c)
a solution
d)
a compound
5.
Which term refers to how strongly an atom of an element attracts electrons in a chemical bond with an atom of a different element?
a)
entropy
b)
electronegativity
c)
activation energy
d)
first ionization energy
6.
At STP, which substance has metallic bonding?
a)
ammonium chloride
b)
iodine
c)
barium oxide
d)
silver
7.
What is the number of electrons shared between the carbon atoms in a molecule of ethyne?
a)
6
b)
2
c)
8
d)
4
8.
Which atom in the ground state has a stable valence electron configuration?
a)
Ar
b)
Si
c)
Al
d)
Na
9.
What occurs when two fluorine atoms react to produce a fluorine molecule?
a)
Energy is absorbed as a bond is broken.
b)
Energy is absorbed as a bond is formed.
c)
Energy is released as a bond is broken.
d)
Energy is released as a bond is formed.
10.
Which gas sample at STP has the same number of molecules as a 2.0-liter sample of Cl2(g) at STP?
a)
1.0 L of NH3(g)
b)
2.0 L of CH4(g)
c)
3.0 L of CO2(g)
d)
4.0 L of NO(g)
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