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WorksheetsUnit 2 Retest
Total questions: 33
Worksheet time: 17mins
Which statement is true comparing the research of Bohr, Rutherford, and Dalton?
Dalton and Bohr modeled their experiments and their theories after Rutherford.
Rutherford and Bohr modeled their experiments and their theories after Dalton.
Dalton and Rutherford modeled their experiments and their theories after Bohr.
All three scientists developed their theories at the same time.
Which of the following conclusions is not supported by the data on the above table?
Atomic radii can be measured for these elements.
Atomic radii increase from left to right.
Atomic radii decrease from left to right.
Atomic radii increases from top to bottom.
Henry Moseley studied x-ray spectra of several elements in a row of the Periodic Table. He found that each element had one more proton than the element immediately to its left.
Which statement best describes Moseley's contribution to the modern Periodic Table?
Recognizing that elements in the Periodic Table have similar properties
Grouping elements in the Periodic Table based on their physical properties
Predicting the properties of missing elements in the Periodic Table
Providing a basis for ordering elements in the Periodic Table
Some physical properties of elements in a group of the periodic table are described above.
The elements described above belong to which group?
Alkaline earth metals
Noble gases
Alkali metals
Halogens
Which of these statements accurately describes the trend of ionic energies or atomic radii in the periodic table?
The atomic radius increases from top to bottom in a group.
The atomic radius increases from left to right across a period.
The ionic energies increase from right to left across a period, and bottom to top in a group.
The ionic energies increase left to right across a period and from top to bottom in a group.
What is the mass number of a carbon isotope that consists of 6 protons, 6 electrons, and 8 neutrons?
2
12
14
20
Which of the following is used to calculate the average atomic mass of an element?
The naturally occurring isotopes
The five most abundant isotopes
The isotopes that are man made
The least common isotopes
Which of the following describes the properties of noble gases?
They have high boiling points.
They are highly reactive.
They are generally nonreactive.
They are solid at room temperature.
The number of valence electrons in Group 2 elements is —
0
1
2
3
As the wavelength of a wave increases, which is also true?
The energy of the wave will increase.
The speed of the wave will increase.
The frequency of the wave will decrease.
Planck's constant will decrease.
As the atomic number on the Periodic Table increases, the number of electrons........
is unchanged
alternates
decreases
increases
How many neutrons would the atom represented above have?
16
18
20
32
Which of the following statements is most accurate regarding atoms?
Most atoms cannot combine with other atoms.
Chemical reactions divide atoms into smaller units.
Atoms of the same element may have different mass numbers.
Atoms only contain protons.
Which of the following is true about Nickel-59? Nickel has -
28 neutrons
28 protons
31 electrons
59 neutrons
The cathode ray experiments led to which particle being discovered?
Nucleus
Proton
Neutron
Electron
The alpha particles in Rutherford’s experiments were used to —
identify chemical properties
identify the melting point
determine molecular mass
bombard sheets of gold
Which of the following showed electrons in specific, fixed orbits?
Rutherford Model
Planck Model
Bohr Model
Quantum Model
The best explanation for the organization of Mendeleev's Periodic Table by atomic mass rather than atomic number is that —
atomic mass is unrelated to the chemical reactivity of elements
Mendeleev organized the table prior to the discovery of the atomic number
different isotopes of elements have different atomic masses
atomic numbers are not affected by the chemical reactivity of elements
Why is an atom considered electrically neutral?
Neutrons equal the number of protons
Proton forces pull on the neutrons
Electrons equal the number of protons
Electrons equal the number of neutrons
Which family correctly represents the elements in Group 1 on the Periodic Table?
Transition metals
Alkali metals
Lanthanide elements
Actinide series
Which of the following statements describes the isotopes of an atom?
Different chemical properties
Different numbers of protons
Different masses
Different numbers of electrons
The ionization energy of potassium is greater than that of —
magnesium
lithium
cesium
sodium
Refer to the above diagram. When bombarded with light, rubidium emits a light with a frequency of 3.84 x 1014 Hz.
Given that all electromagnetic radiation travels at the same speed (c = 3.00 x 108 m/s), calculate the wavelength and predict the color of the light. λ = c/f
Blue
Green
Yellow
Red
Using the Periodic Table, predict which elements will have similar chemical properties or reactivity.
Cadmium, calcium, and carbon
Magnesium, strontium, and barium
Rubidium, yttrium, and zirconium
Nitrogen, sulfur, and bromine
Which set correctly lists the types of electromagnetic radiation in order, from least to most energetic?
Ultraviolet, visible, infrared, microwave
Infrared, microwave, ultraviolet, x-rays
Ultraviolet, visible violet, visible red, infrared
Radio, microwave, ultraviolet, gamma
A sample of Element X is found to contain 72.15% of isotope type 1 (84.9118 amu) and 27.85% of isotope type 2 (86.9092 amu). Calculate the average atomic mass.
85.13 amu
85.47 amu
86.21 amu
86.49 amu
Which of the following atoms would have the largest ionic radius?
Lithium
Sodium
Potassium
Cesium
A red spectral emission of lithium occurs at 6.71 x 10 -7m. Given the speed of light and Planck’s constant
(6.63 X 10-34 Js), calculate the energy of one photon of this light.
E = (hc)/λ
2.96 x 10-33
2.96 x 1051
2.96 x 10-17
2.96 x 10-19
Two graduated cylinders containing two different clear liquids are left undisturbed and uncovered on a countertop in the lab. The initial volume of each is 100 mL. You make note of the volume of each over time. Given the following data, what can you determine about the contents of the two containers?
The liquid in A has a lower rate of evaporation than B.
The liquid in A has a higher rate of vaporization than B.
The liquid in A has more molecules than the liquid in B.
The liquid in A has fewer intermolecular forces than B.
William Ramsey was determined to discover new elements. In collaboration with Lord Rayleigh, and building on the work of Henry Cavendish, Ramsey isolated an unknown gas from a sample of air. Further study showed that the unknown gas was inert because it would not react with any known substances. Following the discovery, Ramsey continued to search for inert gases. His work allowed for precise measurement and the placement of all of these gases in the same group on the Periodic Table. Based on the information provided, what group of elements did William Ramsey discover?
Group 1
Group 15
Group 17
Group 18
An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope?
80
120
200
201
From which of the following atoms would it be the most difficult to remove an electron?
Sodium
Aluminum
Sulfur
Chlorine
Use the above data to identify the sample substance.
D = m/v
strontium
aluminum
carbon
sulfur
