FREE CHEMISTRY AND STUDY GAMES ABOUT BJU

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FREE CHEMISTRY AND STUDY GAMES ABOUT BJU

CHEMISTRY CH 6 EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -15 Questions and Answers -format set of multiple-choice -Expert- Explanation

Question 1: chemical bond

Answer:

A force of attraction produced by transferring or sharing electrons that holds atoms together in compounds.

Question 2: formula unit

Answer:

The simplest ratio of elements in an ionic compound that describes its composition.

Question 3: polarity

Answer:

The tendency of an object to form two localized poles of opposite character. In chemistry, polarity relates to electrical charge.

Question 4: covalent bond

Answer:

Two atoms held together by their mutual attraction for the same pair of electrons. It usually involves two nonmetals.

Question 5: electron-sea theory

Answer:

A theory that offers an explanation of how metals bond: the valence electrons of atoms are said to be freely shared among all atoms; also called the free-electron theory.

Question 6: crystal lattice

Answer:

An extensive three-dimensional structure that represents the regular pattern of atoms or ions.

Question 7: ionic bond

Answer:

The attraction and electron transfer between two oppositely charged ions in a solid. It usually involves a metal and a nonmetal.

Question 8: metallic bond

Answer:

A communal sharing of electrons between metal atoms.

Question 9: alloy

Answer:

A mixture of a metal's atoms with another element. It has metallic properties.

Question 10: delocalized electron

Answer:

An electron that can move between several different bonds; in benzene, and electron that can move throughout circular spaces above and below the plane of bonded nuclei.

Question 11: octet rule

Answer:

The rule that an atom tends to gain, lose, or share electrons until its outer level s and p orbitals are filled with eight electrons. This activity gives an element the electron configuration and stability of a noble gas.

Question 12: electrostatic force

Answer:

The field force exerted by electrical changes. It may be repulsive or attractive depending on the kinds of charges interacting.

Question 13: polyatomic ion

Answer:

A group of atoms that maintains a constant electrical charge while existing as a unit in a wide variety of chemical reactions, such as SO 4 2-.

Question 14: Lewis structure

Answer:

A two-dimensional diagram that uses element symbols and dots to show the bonds between different atoms.

Question 15: network covalent substance

Answer:

Atoms covalently bonded into a continuous three-dimensional network, such as diamond.