Choose the Statement That Is $\textbf{ true: }$

question 68

Multiple Choice

Choose the statement that is $\textbf{ true: }$

• A) Outer electrons efficiently shield one another from nuclear charge
• B) Core electrons effectively shield outer electrons from nuclear charge
• C) Valence electrons are most difficult of all electrons to remove
• D) Core electrons have the lowest ionization energies of all electrons
• E) Two of the above are true.

---

Definitions:

Proportional Tax

A tax whose burden is the same proportion of income for all households.

Regressive Tax

A tax whose burden, expressed as a percentage of income, falls as income increases.

Proportional Tax

A tax system where the rate remains constant regardless of the amount on which the tax is imposed.

Proportional Tax

A tax system where the tax rate remains constant regardless of the amount subject to tax, causing taxpayers to pay the same percentage of their income irrespective of its size.