Which Experiences a Greater Effective Nuclear Charge, an Electron in the Outer

question 9

Multiple Choice

Which experiences a greater effective nuclear charge, an electron in the outer shell of neon (atomic number 10) or an electron in the outer shell of sodium (atomic number 11) ?

• A)sodium because it contains more protons
• B)neon because of less inner shell shielding
• C)sodium because it contains a greater number of shells
• D)neon because it is a smaller atom

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Definitions:

Mesophyll

Photosynthetic tissue in the interior of a leaf; sometimes differentiated into palisade mesophyll and spongy mesophyll.

Spicule

A small, needle-like structure or particle, made of calcium carbonate or silica, found in sponges and certain other invertebrates, providing support.

Cnidaria

A phylum of aquatic invertebrate animals that includes jellyfish, corals, and sea anemones, characterized by their specialized stinging cells.

Porifera

A phylum consisting of simple, multicellular organisms known as sponges, characterized by their porous bodies and lack of true tissues and organs.