Classify each statement about effective nuclear charge, Zeff, as true or false.
ID: 901122 • Letter: C
Question
Classify each statement about effective nuclear charge, Zeff, as true or false.
-Effective nuclear charge increases from left to right across a period on the periodic table
-Across a period, as Zeff increases, atomic size increases
-in a N atom, a 1s electron has a great Zeff than a 2s electron
-Effective nuclear charge does not depend on the number of electrons present in an atom
-Electrons in a s orbital are more effective than those in other orbitals at shielding other electrons from the nuclear charge
-a 1s electron in a B atom has a smaller Zeff than a 1s electron in a Be atom
Explanation / Answer
Effective nuclear charge increases from left to right across a period on the periodic table - TRUE
As we go from left to right in the period, the tendency to have higher charge configuration increases in the periodic table which will lead to higher effective nuclear charge on the atom, since the size of atom remains the same across the period
Across a period, as Zeff increases, atomic size increases - TRUE
The increase in Zeff will lead to increase in the atomic size
Effective nuclear charge does not depend on the number of electrons present in an atom - FALSE
It depends on the number of excess electrons that are present in the molecule