Classify each statement about effective nuclear charge, Zeff, as true or false.
ID: 553446 • Letter: C
Question
Classify each statement about effective nuclear charge, Zeff, as true or false. True False Electrons in a p orbital are more effective than those in other orbitals at shielding other electrons from the nuclear charge. A 1s electron in a Be atom feels a smaller 1s electron in a Li atom. Effective nuclear charge decreases from left to right across a period on the periodic table ff than a Effective nuclear charge is Across a period, as Zeft In a N atom, a 1s electron dependent on the number of ncreases, atomic size decreases. has a greater Zeff than a 2s electron. electrons present in an atom.Explanation / Answer
The effective nuclear charge is dependent on the number of core and valence electrons of the atom. The closer the electron is towards the nucleus , the more effective nuclear charge it faces.
The true statements :
Effective nuclear charge is dependent on the number of electrons present in an atom.
Across a period, as Zeff increases, atomic size decreases.
In a N atom , a 1s electron has a greater Zeff than a 2s electron.
The false statements are :
Electrons in a p orbital are more effective than those in other orbitals at shielding other electrons from the nuclear charge,
A 1s electron in a Be atom feels a smaller Zeff than a 1s electron in a Li atom.
Effective nuclear charge decreases from left to right across a period on the periodic table.