WorksheetsChemistry--Unit 2 Review
Total questions: 19
Worksheet time: 29mins
Which statement below is NOT a true statement about the structure of an atom?
The majority of an atom is empty space associated with the electron cloud.
The nucleus of an atom is very large and contains protons and neutrons.
The nucleus possesses a positive charge associated with protons.
The nucleus contains neutrons which carry no charge.
Choose the statement below that accurately describes the number of neutrons in Argon-41.
It is impossible to know how many neutrons are in Argon-41.
Argon-41 contains 18 neutrons in an atom.
Argon-41 contains 41 neutrons in an atom.
Argon-41 contains 23 neutrons in an atom.
Ernest Rutherford fired positively charged alpha particles at gold foil. A few of the alpha particles were deflected slightly or bounced off. From this data scientists concluded
The nucleus is very small and has no charge.
The nucleus is very diffuse and the protons and neutrons are very far apart.
The nucleus is very small and is positively charged.
The nucleus contains electrons which attracted the positively charged alpha particles.
Which energy-level change shown in the diagram below emits the highest energy?
an electron moving from E6 to E5
an electron moving from E2 to E4
an electron moving from E2 to E3
an electron moving from E2 to E1
What is the electron configuration for nitrogen?
1s2 2s2 2p3
1s2 2s3 2p2
1s2 2s3 2p1
1s2 2s2 2p2 3s1
The orbital notation for an atom is shown. Choose the statement that represents the element and the reason for the answer.
The element is Boron because the atom contains 1 electron in the 3p sublevel.
The element is Lithium because the atom contains 3 electrons.
The element is Aluminum because the atom contains 1 electron in the 3p sublevel.
The element is Ne because the valence shell is completely filled.
Mendeleev's periodic table contained empty spaces. Which statement correctly explains the importance of those spaces?
The empty spaces represented elements that had not been discovered. The table predicted the properties of the unknown elements.
The empty spaces represent elements that could not exist because of periodic trends.
The empty spaces represented new isotopes of previously discovered elements.
The empty spaces showed the electron configurations of the ions in the periodic table.
A new element is discovered. Scientists observe that the element is solid, shiny, and conducts electricity. Which group of elements would the new element best be grouped with?
Nonmetals
Metals
Noble gases
Metalloids
Which electron configuration below represents an atom that has 8 valence electrons?
1s02s1
1s2s2s
1s22s22p2
1s22s22p6
Which of the following electron configurations describes a transition metal?
2s1
⌈Ar⌉ 4s23d10
1s22s22p2
1s22s22p6
In the periodic table, as the atomic number increases from 11 to 17 what happens to the atomic radius?
it remains constant since the number of electron shells is constant.
it increases only since more electrons take up more room.
it increases, then decreases since different sublevels are being filled.
it decreases only because the effective nuclear charge is increasing as the number of protons increase.
The atom that contains only one electron in the highest occupied energy sublevel.
S
Ca
Ga
Br
Which group in the periodic table are the most difficult to ionize?
Noble gases because their valence shells are filed with electrons.
Alkali metals because they have electrons in the 1s sublevel.
Halogens because they only lack 1 electron from having a filled valence shell.
Transition metals because of their high effective nuclear charge.
Which group are the most likely to form negative ions to achieve a filled valence electron shell.
Noble gases
Alkali metals
Halogens
Transition metals
Which of the following shows the correct number of protons, neutrons, and electrons in a neutral cesium-134 atom?
P=55
N=55
E=55
P=55
N=79
E=55
P=55
N=134
E=55
P=134
N=55
E=134
Identify the element with the following electron configuration: 1s22s22p63s1
Helium
Oxygen
Magnesium
Neon
Identify the element with the following Noble gas configuration:
⌈Ar⌉ 4s23d8
Cobalt
Nickel
Copper
Zinc
The atom that contains only one electron in the 4p sublevel is:
S
Ca
Ga
Br
Copper is an element with two isotopes: Cu-65 and Cu-63. The average atomic mass of copper is 63.55 amu. Given this information, which statement about the percent abundance of each isotope is true?
It is impossible to determine the relative abundance.
Cu-63 is approximately 75% of all the copper and Cu-65 is approximately 25%.
Cu-63 is 63.55% of all the copper and Cu is 36.45%.
Cu-65 is approximately 75% of all the copper and Cu-63 is 25%.
