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WorksheetsQuarter 1 Test Review
Total questions: 69
Worksheet time: 3hrs 6mins
A student has been assigned to measure the density of an irregularly shaped piece of metal. Which apparatuses/instruments would be most appropriate to carry out this task?
Which of the following would be the best way to separate the salt and the iron filings?
What was Bohr's basic proposal about the atom?
An electron remains in a fixed position in the space around the nucleus.
An electron is found in a specific circular path, or orbit, around the nucleus.
An electron oscillates, or moves back and forth, within one small region of space in the atom.
An electron readily exchanges position with either a proton or a neutron.
How does the quantum mechanical model differ from the Bohr model in the way it describes the arrangement of electrons in atoms?
The quantum mechanical model describes electrons as moving anywhere in the atom, not specific circular orbits.
The quantum mechanical model describes electrons as moving through specific orbits, and not staying in one place.
The quantum mechanical model places electrons in fixed positions, not moving through specific orbits or orbitals.
The quantum mechanical model describes electrons as moving through cloud-like orbitals, not specific circular orbits.
The isotopes of hydrogen-1 and hydrogen-2 make up nearly all of the hydrogen found in nature. The mass of hydrogen-1 is 1.0078 amu and the mass of hydrogen-2 is 2.0141 amu. Becuase the average atomic mass of hydrogen is 1.0079 amu what can be concluded about the 2 isotopes of hydrogen?
Hydrogen-1 is by far the more abundant isotope.
Hydrogen-2 is by far the more abundant isotope.
Hydrogen-1 and hydrogen-2 are about equally abundant.
The isotope hydrogen-3 does not exist in nature.
What are three types of subatomic particles?
Ions, neutrons, nucleus
Protons, electrons, nucleus
Muons, ions, electrons
Protons, electrons, neutrons
The atomic mass of oxygen is 15.999 amu. What does this value equal?
The mass of a randomly chosen oxygen atom
The mass of every oxygen atom
The mass of an atom of the most common oxygen isotope
The weighted average mass of oxygen atoms in nature
An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are ____.
152 protons and 76 electrons
76 protons and 0 electrons
38 protons and 38 electrons
76 protons and 76 electrons
What distinguishes the atoms of one element from the atoms of another?
The number of protons in the nucleus
The number of neutrons in the nucleus
The total number of protons and neutrons in the nucleus
The total number of protons, neutrons, and electrons
Marshall is interested in how temperature affects the volume of a substance. He conducts an experiment in which he measures the volume of a given mass, in milliliters (ml), at various temperatures, in Kelvin (K). He plots his results, as shown in the graph. From the graph, which of the following can Marshall correctly conclude?
Energy may change form, but it cannot be created nor destroyed
Temperature is directly proportional to the volume of a given mass
Mass may change form, but it can neither be created nor destroyed
Temperature is inversely proportional to the volume of a given mass
Given the hypothesis that the element zinc prevents cancer, which of the following procedures BEST exemplifies the nature of scientific investigation?
Analyze zinc, looking for allotropic forms
Do research on zinc and its uses throughout history to determine if there is evidence that zinc prevents incidence of cancer.
Give zinc supplements to a group of rats and not to another group. After a period of time, determine if there is a higher incidence of cancer in the control group.
Rely on testimony of friends and relatives, as well as conduct a survey to see if there is a concentration of cancer in the people not taking zinc supplements.
A student has been assigned to measure the density of an irregularly shaped piece of metal. Which apparatuses/instruments would be most appropriate to carry out this task?
In what ways is a model similar to the thing it represents?
A model must be identical to the thing it represents in every way.
A model must be identical to the thing it represents in every way except that it can be made out of different materials.
A model must be identical to the thing it represents in every way except that it can be a different size.
A model can be different from the thing it represents in either its size or the materials it is made of.
Which of the following trends in the periodic table should be expected as the atomic number of the halogens increases from fluorine (F) to iodine (I)?
Atomic radius decreases
Electronegativity decreases
Atomic mass decreases.
Electron number decreases
Which of the following includes an example of a chemical property of an element?
Aluminum is a solid at room temperature and is a poor thermal insulator.
Sulfur is not shiny and is not malleable
Sodium reacts with other elements
Silicon is shiny and is a poor conductor of electricity
The gold foil experiment performed in Rutherford's lab __________.
confirmed the plum-pudding model of the atom
led to the discovery of the atomic nucleus
was the basis for Thompson's model of the atom
proved the existence of the neutron
When alpha particles are used to bombard gold foil, as in Rutherford’s famous gold foil experiment, most of the alpha particles pass through without being deflected. This results indicates that most of the volume of a gold atom consists of
empty space
a solid block of matter
tightly packed subatomic particles
gas plasma
Thomson’s experiment using the cathode ray tube and positively and negatively charged plates supported the existence of
protons
electrons
neutrons
quarks
Noble gases received their name because of their lack of reactivity. Based on what you know about noble gases, which one of the selections below represents the electron configuration of a noble gas?
1s² 2s² 2p6 3s2 3p6 4s2 3d8
1s² 2s² 2p6 3s2 3p6 4s2 3d2
1s² 2s² 2p6 3s2 3p6 4s2 3d10 4p3
1s² 2s² 2p6 3s2 3p6 4s2 3d10 4p6
Which of the following statements is generally correct regarding the atomic radii of elements in the periodic table?
Atomic radii increase from left to right across a period
Atomic radii decrease from left to right across a period
Atomic radii decrease from right to left across a period
Atomic radii decrease down a group
Which pair of elements would you expect to exhibit the greatest similarity in their physical and chemical properties?
H, Li
Cs, Ba
Ca, Sr
Ga, Ge
The only group of elements that DO NOT form ions and are found as monatomic atoms in nature are the:
noble gases
alkali metals
halogens
alkaline earth metals
An ion with 5 protons, 6 neutrons, and a charge of +3 has an atomic number of
5
6
8
3
Helium is a noble gas with how many electrons in one energy level?
3
2
8
6
Silicon-30 has _____ protons, _____neutrons and _____ electrons
14, 30, 16
14, 30, 14
14, 14, 14
14, 16, 14
Which of the following are examples of a Chemical Change?
Iron Rusting
Gas Burning
Breaking a glass
Boiling water
Burning Wood
What are the shielding electrons?
Electrons in the highest energy level furthest from the nucleus.
Electrons in the energy levels between the nucleus and the valence shell.
Electrons that are lost and gained by an atom to get a full octet.
Electrons that have absorbed a photon and moved from a lower to a higher energy level.
What are valence electrons?
Electrons in the outermost energy level.
Electrons closest to the nucleus.
Electrons that identify the atom as that of a particular element.
Electrons that release photons and move from a higher to lower energy level.
Which EM waves have the longest wavelength?
radio
x-rays
ultraviolet
gamma rays
Which EM waves are have the highest energy & are the most dangerous?
radio
gamma rays
infrared
x-rays
What happens to frequency when wavelength decreases?
stays the same
decreases
increases
There is no relationship between wavelength & frequency.
Which type of electromagnetic wave travels fastest through a vacuum?
radio
gamma rays
visible light
They all travel at the same speed.
The ____________ is a characteristic of light that represents the number of cycles that pass through a stationary point in a given period of time (often measured in 1/s, s-1, or hertz (Hz))
wavelength
frequency
Reorder the following by increasing wavelength.
radio waves
microwaves
infrared radiation (IR)
visible light
ultraviolet radiation (UV)
According to the Bohr model of the atom, the single electron of a hydrogen atom circles the nucleus
in specific, allowed orbits
in one fixed orbit at all times
at any of an infinite number of distances, depending on its energy
counterclockwise
If an electron moves from n=4 to n=2 it ____
absorbs energy
releases energy
What combination of elements will form a covalent compound?
Metal and metal.
Metal and nonmetal.
Nonmetal and nonmetal.
What type of bond is NaCl?
Ionic Bond
Covalent Bond
Both bonds
Neither bond
The electrons in a polar covalent molecule are shared...
Evenly
Unevenly
Electrons are not shared
None of the Above
In a polar covalent bond, the electrons gather around...
The atom with the Greatest Electronegativity
The atom with the Lowest Electronegativity
Each atom Equally
None of the Above
