NEW
Font size
WorksheetsDec 2021 Final Exam Review
Total questions: 30
Worksheet time: 30mins
Which of the following indicates a physical change?
Condensation
Rusting
Fermentation
Burning
One similarity between a small, solid sample of Aluminum and a large, liquid sample of aluminum is that both samples have
a definite shape
a definite volume
the same number of atoms
the same amount of energy
Which two physical properties are different when evaluating a large sample and a small sample of a substance?
Color and density
Mass and volume
Mass and density
Color and volume
Which of the following is an example of a physical change?
A pipe rusting
Water boiling
A tree decomposing
Milk souring
The sum of the protons and neutrons in an atom equals the________.
Atomic number
Nucleus number
Electrons
Mass Number
How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain?
50 p, 50 e, and 75 n
75 e, 50 p, 50 n
120 n, 50 p, 75 e
70 n, 75 p, 50 e
What does the number represent in Platinum-194?
The atomic number of the isotope
The mass number of the isotope
The electric charge of the isotope
The date when the element was discovered
What property did Mendeleev use to develop and organize his periodic table?
Atomic mass
Atomic number
Abundance of the element
Density of the element
How are elements arranged int he modern periodic table?
Increasing atomic mass
Increasing atomic number
Increasing density
Alphabetical order
What are the three broad classes of elements?
Solids, liquids, and gases
Metals, nonmetals, and gases
Metals, liquids, and noble gases
Metals, nonmetals, and metalloids
Which group of elements have a full outer shell of valence electrons?
Alkali metals
Noble Gases
Halogens
Alkaline Earth Metals
Which of the following is the correct Lewis electron-dot diagram for the sodium atom?
A
B
C
D
The only Noble Gas without eight valence electrons is
Ar
Ne
He
Kr
Iron is a transition metal with an atomic number of 26. What is the electron configuration of iron?
1s22s22p63s23p64s1
1s22s22p63s23p64s23d6
1s22s22p63s23p63d8
1s22s22p63s23p64s24p6
What are the valence electrons of an atom?
The electrons that an atom gains when it becomes an anion
The electrons that remain closest to the nucleus
The electrons in the outermost shell of the atom
The electrons that an atom loses when it becomes a cation
How many valence electrons are in each carbon atom?
1
2
4
6
What is the name of the following compound? MgCl2
Magnesium chlorine
Magnesium chloride
Magnesium (II) chloride
Magnesium dichloride
What is the formula for the following compound: Diboron tetrabromide
BBr
B2Br4
BBr4
B2Br
What type of radioactive decay is displayed in the equation?
Alpha
Beta
Gamma
None of the above
How do fission and fusion differ?
Fission occurs with light elements; fusion occurs with heavy elemetns
Fission releases energy by splitting large nuclei; fusion fuses small nuclei
An element that scientists may easily follow through a biological systems
All of the above are correct
What is the difference between a pure substance and a mixture?
A pure substance cannot be separated by physical or mechanical methods, and a mixture can be separated
A mixture is made form elements and pure substance is made from multiple substances mixed together
Pure substances never have set ratios of elements and mixtures always have set ratios
Pure substances are made of molecules, and mixtures are not made of molecules
In comparison to the other two states of matter, solid particles are
packed tightly together
moving in all directions
loosely bonded and flowing
so hot that electrons are removed from the nucleus
Which of the following statements explains why oxygen is classified as a pure substance and air is classified as a mixture
Oxygen contains only one substance, but air contains several substances
Oxygen has a higher density than air
Oxygen undergoes phase changes, whereas air is always a gas
Oxygen is more reactive than air
Which of the following radioactive decay is shown in the equation below:
Alpha
Beta
Gamma
All of these
Element X has two isotopes. If 54% of the element has an atomic mass of 49.6 amu, and 56% of the element has an atomic mass of 42.4 amu, the average atomic mass of element X is equal to which of the following?
(0.54 x 49.6) + (0.56 x 42.4)
(0.54 - 49.6) x (0.56 + 42.4)
(0.54 + 49.6) x (0.56 + 42.4)
(0.54 - 49.6) + (0.56 - 42.4)
Which statement describes a chemical property of aluminum?
Aluminum is not malleable
Aluminum does not react with air
Aluminum conducts electrical current
Aluminum has a density of 2.7 g/cm3 at STP
What VSEPR shape best describes Boron Trifluoride?
Bent
Linear
Trigonal Planar
Tetrahedral
What type of bond is shown in the picture?
Ionic
Covalent
Metallic
What type of bond is displayed in the picture?
Ionic
Covalent
Metallic
Which of the following best describes the relationship between frequency and wavelength of electromagnetic waves?
Frequency remains constant, wavelength increases
Frequency increases and wavelength decreases
Wavelength decreases as the frequency decreases
Wavelength remains constant, the frequency increases
