Unit 3 Exam Review Prep

Unit 3 Exam Review Prep

Assessment

Flashcard

Chemistry

9th - 12th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a polar molecule?

Back

A polar molecule is a molecule that has a net dipole moment due to the presence of polar bonds, which arise from differences in electronegativity between atoms.

2.

FLASHCARD QUESTION

Front

What is a non-polar molecule?

Back

A non-polar molecule is a molecule that does not have a net dipole moment, often because the atoms bonded to the central atom are the same or symmetrically arranged.

3.

FLASHCARD QUESTION

Front

What determines if a molecule is polar or non-polar?

Back

The shape of the molecule and the electronegativity of the atoms involved determine if a molecule is polar or non-polar.

4.

FLASHCARD QUESTION

Front

What are lone pairs in a molecule?

Back

Lone pairs are pairs of valence electrons that are not shared with another atom and are not involved in bonding.

5.

FLASHCARD QUESTION

Front

How many lone pairs does NH3 (ammonia) have?

Back

NH3 has 1 lone pair.

6.

FLASHCARD QUESTION

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

7.

FLASHCARD QUESTION

Front

How many valence electrons does Silicon (Si) have?

Back

Silicon has 4 valence electrons.

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