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Mastering Molecular Structure

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Questions and Answers

According to Lewis Theory, which elements have an octet of electrons once they form ions and covalent compounds?

All elements including hydrogen

Only covalent compounds

All elements except hydrogen (correct)

Only monoatomic ions

What does the Lewis dot symbol for an atom or ion represent?

The number of valence electrons (correct)

The number of electrons in the inner shell

The number of neutrons

The number of protons

What is a covalent bond?

A chemical bond formed by the repulsion between two atoms

A chemical bond formed by the sharing of a pair of electrons between two atoms (correct)

A chemical bond formed by the transfer of electrons between two atoms

A chemical bond formed by the attraction between positive and negative ions

What is the basic rule for drawing Lewis dot symbols?

<p>Draw the atomic symbol and count the electrons in the valence shell</p> Signup and view all the answers

What does each dot in a Lewis symbol represent?

<p>One electron</p> Signup and view all the answers

Study Notes

Lewis Theory

Nonmetals, such as carbon, nitrogen, oxygen, and fluorine, have an octet of electrons once they form ions and covalent compounds.

Lewis Dot Symbols

The Lewis dot symbol for an atom or ion represents the valence electrons of an atom or ion.
The basic rule for drawing Lewis dot symbols is to write the symbol of the element and then surround it with dots, each representing a valence electron.

Covalent Bonds

A covalent bond is a chemical bond that forms between two atoms when they share one or more pairs of electrons.

Lewis Symbols

Each dot in a Lewis symbol represents a valence electron.
Lewis symbols are used to show the arrangement of valence electrons in an atom or ion.

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Description

Test your knowledge on molecular structure and bonding with this quiz focusing on Lewis Theory and Lewis structures. Explore concepts such as the octet rule and how it applies to atoms and ions. See if you can identify the number of electrons needed to fill an octet.