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WorksheetsUnit 3 Test
Total questions: 50
Worksheet time: 2hrs 40mins
Choose one letter that represents an element that is a noble gas?
(a)
Which letter represents an element that is an alkali metal?
(a)
Which letter represents an element that is a transition metal?
(a)
Which letter represents an element that is a halogen?
(a)
Which solid element will be conductive, malleable, soft and reacts with water?
D
A
M
J
Which letter represents an element that has an ending electron configuration of s2?
(a)
Which letter represents an element that has an ending electron configuration of s2p6?
(a)
Which letter represents an element that has similar properties as R?
(a)
Which letter represents an element that is located in period 2?
(a)
Which letter represents an element that is located in group 2?
(a)
How many energy levels will have electrons for the element located at Q?
1
2
3
4
In following the Aufbau diagram, the order electrons fill energy sublevels begins with 1s, 2s, 2p, 3s...what would be the next three?
3p, 3d, 4s
3p, 4s, 3d
3d, 3p, 4s
3d, 4s, 3p
What is incorrect about the following electron configuration for Magnesium?
1s22s22p53s2
The 3s sublevel should be written before 2p
There are too many electrons in energy level 3s
There are not enough electrons in energy level 2p
The electron configuration is correct as is
What is incorrect about the electron configuration for Aluminum?
1s22s22p63s3
There are no electrons in the 3p sublevel
There are too many electrons in the 2p sublevel
The electrons fill the 3s sublevel before the 2p sublevel
The electron configuration is correct as written
Which of letters represents the element with the highest electronegativity? (of the letters labeled)
(a)
Which of letters represents the element with the largest atomic radius? (of the letters labeled)
(a)
According to the Aufbau diagram, which is the presumed shorthand electron configuration for silver?
[Ne] 3s23p64s24p65s24d9
[Kr] 4s24d9
[Kr] 5s24d9
[Kr] 5s25d9
Like Silver, Copper actually does not follow the Aufbau rules completely. Which is the true electron configuration of copper?
[Ne] 4s24p65s24d9
[Ar] 4s24d9
[Ar] 4s23d9
[Ar] 4s13d10
When an electron moves from a lower energy level to a higher energy level, the electron:
always doubles its energy
absorbs a quantum of energy
moves closer to the nucleus
always halves its energy
In a neon light, when is the light given off?
when the protons move
when atoms collide
when excited electrons return to their ground state
when electrons absorb energy
The maximum number of electrons that can occupy any orbital at each energy level is:
one
two, if they have opposite spins
two, if they have the same spin
no more than 4
The atomic number of an element is determined by each atom's number of:
electrons
protons
neutrons
nucleons
Protons and neutrons have:
the same charge and the same mass
the same charge but different masses
different charges but the same mass
different charges and different masses
The Bohr Model is our most accurate representation of an atom.
True
False
The orbital diagram above represents which element?
Calcium
Titanium
Scandium
Strontium
What rules does the orbital diagram illustrate that an electron configuration does not?
Hund's Rule and Aufbau
Hund's Rule and Pauli Exclusion Principle
Pauli Exclusion Principle and Aufbau
None of the above
Which type of element has properties that include malleability, ductility, and high luster
nonmetals
metalloids
metals
Which type of element has properties that include being poor conductors and brittle?
nonmetals
metalloids
metals
Which of the following elements would be classified as a metalloid?
Silicon
Gallium
Lead
Nitrogen
Which element has the greatest atomic radius?
Potassium
Rubidium
Calcium
Strontium
Metals ______________________.
gain electrons to form anions
gain electrons to form cations
lose electrons to form anions
lose electrons to form cations
Nonmetals ______________________.
gain electrons to form anions
gain electrons to form cations
lose electrons to form anions
lose electrons to form cations
Why does the ionization energy increase across a period of the periodic table?
Increase in Coulombic Attraction
Less Shielding
Both of the above
None of the above
The mass of an atom is calculated from the number of:
protons
neutrons
protons and neutrons
neutrons and electrons
What is the mass number of the atom above?
(a)
How many neutrons are in the atom above?
(a)
Calculate the atomic mass of an unknown element. The two isotopes of this element have atomic masses and relative abundance of 78.92 amu (50.69%) and 80.92 amu (49.31%).
Round properly to two decimal places for your answer.
(a)
Which list contains elements that fall within the same group on the periodic table?
He, Ar, Xe
O, F, Ne
K, Rb, Ba
H, He, Li
Thallium has two isotopes, thallium-203 and thallium-204. Thallium's atomic number is 81 and its atomic mass is 204.38 amu. Which statement about the thallium isotopes is true?
There is more thallium-203 in nature
Atoms of both isotopes have 81 protons
Thallium-205 atoms have fewer neutrons
The most common atom of thallium has a mass of 204.38 amu
Arrange the following sublevels in order of increasing energy: 3d, 2s, 4s, 3p
3d, 2s, 4s, 3p
2s, 3p, 3d, 4s
4s, 3p, 3d, 2s
2s, 3p, 4s, 3d
How many valence electrons does an alkali metal have?
1
2
7
8
How many valence electrons does a halogen have?
1
5
7
8
How many valence electrons does a noble gas have?
1
5
7
8
Which subatomic particle determines the identify of an atom?
electrons
protons
neutrons
nucleons
What are isotopes?
Atoms with the same number of protons but different numbers of electrons
Atoms with the same number of electrons but different numbers of protons
Atoms with the same number of protons but different numbers of neutrons
Atoms with the same number of neutrons but different numbers of protons
Which of these four elements has the greatest electronegativity?
Na
Al
F
I
Which element in the pair has a higher electronegativity value?
Mg or Ne
(a)
What element is represented in the orbital diagram above?
Vanadium
Chromium
Niobium
Nickel
Which noble gas does not have eight electrons in its highest occupied energy level?
Krypton
Neon
Argon
Helium
In which pair of elements are the chemical properties of the elements most similar?
sodium and chlorine
nitrogen and phosphorus
boron and oxygen
arsenic and bromine
