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WorksheetsH.Chem- 70% Review- Units 4 & 5: Electron Config & PT
Total questions: 35
Worksheet time: 31mins
How many valence electrons are present in the outer energy level of an element with 14 electrons and 14 protons in the neutral state?
2
4
8
18
According to the Aufbau Principle, which atomic sublevel follows 4p?
4d
4f
5p
5s
How many electrons will completely fill the s sublevel in the 2 PEL?
2
6
10
14
Which is the lowest energy level that can contain a d sublevel?
1
2
3
4
Which is the correct electron configuration for aluminum?
1s²2s²2p⁷
1s²2s²2p⁶3s³
1s²2s²2p⁶3p³
1s²2s²2p⁶3s²3p¹
Name the element represented by the configuration [Kr]5s²4d9
(Hint: Spelling counts)
(a)
How many valence electrons does the element in the picture have?
What is the electron configuration for titanium, Ti?
1s² 2s² 2p⁶ 3s² 3p⁶ 3d² 4s²
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d²
1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁴ 4s²
1s² 2s² 2p⁶ 3s² 3p⁶ 3d³ 4s¹
Match the parts of the electron configuration to what it represents.
1
period
s
block
2
element
Reorder these from shortest electron configuration to the longest:
hydrogen
boron
argon
calcium
xenon
Check box ALL THE CORRECT STATEMENTS that correctly describe nonmetals?
Poor conductors of heat and electricity
Usually gases or brittle solids at room temperature
Tend to gain electrons and form anions
Are mostly located on the right side of the periodic table
Are mostly located on the left side of the periodic table
What periodic group includes argon, krypton, and xenon?
noble gases
halogens
alkaline earth metals
actinides
Each period on the periodic table corresponds to
an energy level.
a sublevel.
atomic mass.
atomic number.
Calcium (Ca) and arsenic (As) have the same PEL which is # ______
Identify the sublevels in a period that contains 8 elements.
s, f
s, p
s, p, d
s, p, d, f
Elements in which the d-sublevel is being filled have properties of
metalloids.
nonmetals.
metals.
actinides.
The elements whose electron configurations end with s2 p5 in their outmost energy level are known as
noble gases
transition metals
alkali metals
halogens
What is the symbol for the element that is in period 4, group 8? (SPELLING COUNTS)
(a)
Iodine belongs to group 17. How many valence electrons does iodine have?
17
35
7
4
To what period and group does nitrogen belong?
period 15, group 2
period 2, group 17
period 17, group 2
period 2, group 15
What is the BEST explanation of the trend of decreasing atomic radius when moving across the period left to right?
The number of neutrons decreases
The number of energy levels increases
The PEL stays the same across a period
The atomic number increases
The energy required to remove an electron from an atom is called
electron energy.
ionization energy.
electronegativity.
valence energy.
What is the term for electrons available to be lost, gained, or shared when atoms form compounds.
ions
s-block electrons
valence electrons
the electron cloud
A measure of the ability of an atom to attract electrons from another atom in a chemical compound is called
ionization energy
electronegativity
electron configuration
electron affinity
Write the symbol for the element that is the least electronegative?
(a)
How does an atom’s ability to attract electrons in a chemical compound change as you move left to right across period 4 from cobalt, Co, to bromine, Br?
It does not change.
It can’t be predicted.
It increases.
It decreases.
What is the most active element in group 17?
iodine, I
bromine, Br
chlorine, Cl
fluorine, F
The element with the lowest electronegativity in period 3 is ______?
CHECKBOX ALL the elements with a higher ionization energy than nitrogen (N).
O
P
F
Check the boxes of ALL THE CORRECT STATEMENTS that describe electronegativity trends.
Electronegativity increases across a period from left to right
Electronegativity decreases down a group
Fluorine has the lowest electronegativity value
Noble gases have the lowest electronegativity values
