36 Questions
What is the effect of increasing the size of the charges on the interaction between them?
The strength of the interaction increases
What is the effective nuclear charge of a 2s1 electron in the ground state of Lithium?
A charge closer to +1
Which of the following is true about shielding by electrons in the same energy level?
They shield each other to some extent
Why does the effective nuclear charge (Zeff) decrease as the distance from the nucleus increases?
Because the electrons in inner energy levels shield the outer electrons
What is the result of the orbital shape of certain electrons?
They penetrate close to the nucleus
Which of the following is a result of penetration?
Electrons have a higher energy level
What is the electron configuration of the main group s-block metals and Aluminum when they lose electrons to attain a noble gas configuration?
They lose all outer electrons with the highest n value
Which of the following elements is known to form an anion by gaining electrons to attain a noble gas configuration?
Selenium
What is the magnetic behavior of a species with all its electrons paired?
It is slightly repelled by a magnetic field
What happens to the apparent mass of a paramagnetic substance when it is placed in a magnetic field?
It increases
What is the order of electron loss in transition (d-block) metals?
ns electrons before (n-1)d electrons
Which of the following elements exhibits paramagnetism due to the presence of unpaired electrons?
Ag (Z=47)
Which type of orbital penetrates the nucleus the best?
s orbitals
How does the penetration of 2p electrons compare to 2s electrons?
2p electrons have weaker penetration than 2s electrons
Which sublevel experiences a greater attractive force to the nucleus due to deeper penetration?
2s sublevel
In a multielectron atom, what energy order is correct for the sublevels 3p, 3s, and 3d?
3s < 3p < 3d
What energy inversion may occur between the 4s and 3d sublevels in certain atoms?
4s < 3d
How does nuclear attraction change with increased penetration and decreased shielding?
Nuclear attraction increases
What is the primary purpose of indicating the value of the principal quantum number n in an electron configuration?
To identify the type of sublevel occupied by electrons
In an orbital diagram, what does an arrow pointing up represent?
An electron with a spin up
What is the result of paired electrons occupying the same orbital?
The attraction forces of their magnetic poles are aligned
What is the number of electrons in the 1s sublevel in the ground state of a hydrogen atom?
1
What is the type of orbital that is occupied by electrons in the n = 3 level?
Only s, p, and d orbitals
What is the purpose of writing an electron configuration?
To describe the sublevels occupied by electrons
What is the primary characteristic of inner electrons in an atom?
They form the closed electron shells of the atom and have a much lower energy than the outer electrons.
According to the periodic table, what is the value of n for the outermost s and p sublevels in a given period?
Period number
What is the main reason why outer electrons are involved in chemical bonding?
They are in the highest energy level and are more easily removed.
What is the correlation between the outer electron configuration of elements in the same group and their chemical behavior?
Similar outer electron configurations result in similar chemical behavior.
What is the relationship between the period number and the n value of the outermost d sublevel in the periodic table?
The period number - 1 is the n value of the outermost d sublevel.
What is the significance of the noble gas configuration in the electron configuration of elements?
It is the configuration that elements achieve when they gain or lose electrons to form ions.
Which electron configuration is a valid possibility for helium's excited state?
1s13d1
How many electrons are present in the 1s orbital of a Ne atom?
2
Which of the following ions has a ground state electron configuration of 1s0?
He+
In the orbital diagram for fluorine, which set of quantum numbers would correspond to the third electron?
n = 2, l = 1, ml = 0, ms = +1/2
What is the likely electron configuration of the valence electron in a F atom?
2p5
If an He atom was ionized to form He2+, how many electrons have been removed?
2
Test your knowledge on the strength of electron-nucleus interaction and how it is affected by the size of charges, shielding, and effective nuclear charge in multi-electron atoms. Explore concepts related to electron attraction and repulsion within an atom.
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