What is the chemical formula for copper(II) sulfate? CuSOmc026-1.jpg Cumc026-2.jpgSOmc026-3.jpg CuS Cumc026-4.jpgS
2 answers:
Answer:
Explanation: For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here Copper is having an oxidation state of +2 and sulfate is a polyatomic ion with oxidation state of -2. Thus they combine to form neutral .
The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.
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<u>Answer: </u>The correct statement is X is the effective nuclear charge, and it increases across a period.
<u>Explanation:</u>
We are given that:
X = number of protons − number of core electrons
Effective nuclear charge is defined as the actual nuclear charge (Z = number of protons) minus the screening effect caused by the electrons present between nucleus and valence electrons. These electrons are the core electrons.
The formula used for the calculation of effective nuclear charge given by Slater is:
where,
= effective nuclear charge
Z = atomic number or actual nuclear charge or number of protons
= Screening constant
The effective nuclear charge increases as we go from left to right in a period because nuclear charge increases with no effective increase in screening constant.
Hence, the correct answer is X is the effective nuclear charge, and it increases across a period.