WorksheetsChemistry Semester 1 Review 2025
Total questions: 67
Worksheet time: 45mins
To have a full valence shell of electrons, oxygen must...
lose 2 electrons
gain 2 electrons
gain 6 electrons
lose 5 electrons
To have a full valence shell of electrons, an alkaline earth metal must...
lose 2 electrons
gain 2 electrons
gain 6 electrons
lose 5 electrons
SCl2, sulfur dichloride, is a ____ molecule and has a ____ shape.
polar; bent
nonpolar; bent
polar; linear
nonpolar; linear
NH3, ammonia, is a polar molecule and has a ____ shape.
bent
trigonal planar
trigonal pyramidal
tetrahedral
CO2, carbon dioxide, is a ____ molecule with a ___ shape.
polar; pyramidal
nonpolar; trigonal planar
polar; bent
nonpolar; linear
Write the name of this compound: SF6.
(a)
Polyatomic ions are groups of covalently bonded atoms that have a special name. What is the NAME for CO3 2-?
(a)
Polyatomic ions are groups of covalently bonded atoms that have a special name. What is the NAME of C2H3O2-?
(a)
Polyatomic ions are groups of covalently bonded atoms that have a special name. What is the NAME of SO4 2-?
(a)
Polyatomic ions are groups of covalently bonded atoms that have a special name. What is the FORMULA for NITRATE?
NO2-
NO3-
NH4+
CN-
Polyatomic ions are groups of covalently bonded atoms that have a special name. What is the FORMULA for HYDROXIDE?
NO2-
NO3-
H-
OH-
A valid difference between metals, nonmetals, and metalloids is...
Metals are the most conductive, ductile, and lustrous elements
Metalloids are frequently dull and brittle
Nonmetals are almost always solid at room temperature
Metals like gallium and mercury can be gaseous at room temperature
What is the ionic charge on an alkali metal when bonding? Put the number AND the sign, like 3+
(a)
What is the ionic charge on a halogen when bonding? Put the number AND the sign, like 3+
(a)
Why are noble gases so unreactive?
They can easily lose one valence electron to have a full outer shell of electrons in the previous energy level
They can easily gain one valence electron to reach 8
They have 8 valence electrons
They are the most electronegative elements
Heisenberg's uncertainty principle states that we cannot know...
the exact position and speed of a particle like an electron
the charge and mass of a particle like an electron
the electron configuration of certain transition metals
the spin of an electron
Thanks to Schrodinger's quantum mechanical model of the atom, we know that...
Electrons behave as standing waves around the nucleus
Electrons orbit the nucleus in rings
We can predict the position of a proton with perfect accuracy
The nucleus is dense, small, and positively charged
John Dalton's model of the atom was flawed because...
He didn't know about the existence of protons, neutrons, and electrons
He said isotopes have a different number of neutrons
He believed atoms could be destroyed
He predicted the existence of radioactivity but couldn't prove it
JJ Thomson's model of the atom was flawed because...
His 'plum pudding' model didn't account for the nucleus
He showed that electrons orbit the nucleus like planets
He believed atoms were indivisible
He developed it from the gold foil experiment
Alpha decay involves emission of...
a gamma ray (0/0 γ)
an electron (0/-1 e)
a neutron (0/1 n)
a helium nucleus (4/2 He)
Beta minus decay involves emission of...
a helium nucleus (4/2 He)
an electron (0/-1 e)
a neutron (0/1 n)
a gamma ray (0/0 γ)
Gamma decay involves emission of...
a helium nucleus (4/2 He)
an electron (0/-1 e)
a neutron (0/1 n)
a gamma ray (0/0 γ)
If plutonium-239 undergoes alpha decay, its product is...
uranium-239
plutonium-235
uranium-235
neptunium-243
Convert 88 dL (deciliters) to L. KHDudcm
8.8 L
880 L
8,800 L
0.88 L
Convert 6.4 hg (hectograms) to g. KHDudcm
0.64 g
64 g
640 g
6,400 g
Convert 850 mL to cL. KHDudcm
0.85 cL
8,500 cL
8.5 cL
85 cL
Convert 25 km to m. KHDudcm
250,000 m
25,000 m
2,500 m
250 m
Round 0.038891 to 3 significant figures.
(a)
Round 520.78 to 3 significant figures.
(a)
Convert 0.00076 to scientific notation.
7.6 * 10^5
7.6 * 10^-5
7.6 * 10^4
7.6 * 10^-4
Convert 0.0024 to scientific notation.
2.4 * 10^3
2.4 * 10^-2
2.4 * 10^-3
2.4 * 10^-4
Convert 67,000,000 to scientific notation.
6.7 * 10^6
6.7 * 10^-7
6.7 * 10^7
6.7 * 10^8
Convert 35,000 to scientific notation.
3.5 * 10^3
3.5 * 10^4
3.5 * 10^-4
3.5 * 10^5
How many sig figs are in 80.040?
(a)
How many sig figs are in 20.0?
(a)
How many sig figs are in 0.059?
(a)
Write the name of this compound: P2O5
(a)
Roman numerals like IV and III should only be used for ____.
most transition metals like Fe
nonmetals like S
most metals like Ba
metalloids like Si
Greek prefixes like tri- and penta- should be used only for ____ compounds.
transition metal
ionic
covalent
metallic
A metallic bond is defined by...
Equal sharing of electrons
Unequal sharing of electrons
A sea of delocalized valence electrons
Metals giving electrons to nonmetals
Write the name of this compound: FeSO4.
(a)
Write the name of this compound: CaCl2
(a)
Write the name of this compound: K3PO4
(a)
Write the formula for calcium carbonate.
(a)
Write the formula for carbon tetraiodide.
(a)
Atomic radius is the size of the atom, which is correlated with how many energy shells are present. Where is atomic radius LARGEST on the periodic table?
Bottom right
Bottom left
Upper left
Upper right
Electronegativity is the desire of an atom for an electron, and this is correlated with the number of valence electrons an atom has. Where is electronegativity HIGHEST on the periodic table?
Bottom right
Bottom left
Upper left
Upper right
What is the WEAKEST intermolecular force (IMF)?
(a)
What is the SECOND WEAKEST intermolecular force (IMF)?
(a)
Dry ice changes directly to gaseous carbon dioxide. What phase change is occurring?
(a)
Humid air changes to water droplets on a cold object. What phase change is occurring?
(a)
Which ion is MOST soluble in water based on the solubility chart?
PO43-
SO42-
NO3-
S2-
Which ion is LEAST soluble in water based on the solubility chart?
Br-
CO32-
NO3-
Cl-
Which ionic compound is predicted to be insoluble, or (s), in water?
Ca(NO3)2
CaBr2
CaS
CaCO3
Which ionic compound is predicted to be soluble, or (aq), in water?
ZnS
Na2CO3
Ba3(PO4)2
FeOH
Based on the solubility curve of KCl, which point is predicted to be supersaturated?
30g at 10C
40g at 80C
60g at 60C
30g at 70C
Based on the solubility curve of KNO3, which point is predicted to be unsaturated?
10g at 30C
30g at 20C
40g at 10C
50g at 20C
What is TRUE about the Gold Foil experiment done by Rutherford?
it showed that the atom has a large, dense, positively charged nucleus
it showed that the atom is mostly "empty space" with a dense, small, positively charged nucleus
It showed that the nucleus is negatively charged and repels electrons
It showed that protons and neutrons both exist in the nucleus
Isotopes of the same element have a different number of ____ and therefore can have different ____.
neutrons; mass
protons; mass
neutrons; charge
electrons; mass
Light with a shorter wavelength has ____ energy.
excited
equal (since speed of light is a constant)
lower
higher
Light with a lower frequency has ____ energy.
ground state
equal (since speed of light is a constant)
lower
higher
Ionic bonds tend to occur between (a) and nonmetals.
Which of the following is TRUE about nuclear fusion?
Involves the splitting of large isotopes, like uranium-235, into smaller ones
Occurs on the inside of planets
Currently used in power plants today to generate electricity
Produces the most energy per gram of reactant
Which of the following is TRUE about nuclear fission?
Involves the joining of smaller isotopes, like hydrogen-2 and hydrogen-3
Occurs inside of stars
Currently used in power plants today to generate electricity
Produces the most energy per gram of reactant
If one carbon atom bonded with two oxygen atoms, what kinds of bonds would form?
Single bonds between carbon and oxygen
Double bonds between carbon and oxygen
Triple bonds between carbon and oxygen
An ionic bond where oxygen gains electrons
What is the correct arrangement of these elements in order of increasing electronegativity? (lowest to highest) F, Ge, N, Ca
F, N, Ca, Ge
Ca, Ge, F, N
Ca, Ge, N, F
F, N, Ge, Ca
What is the correct arrangement of these elements in order of increasing atomic radius? (lowest to highest) F, Ca, N, Ge
F, N, Ca, Ge
Ca, Ge, F, N
Ca, Ge, N, F
F, N, Ge, Ca
