Unit 1: Lesson 4 - Molecular Structure

True or False: All compounds have high melting and boiling points.

• True

• False

Tags

NGSS.MS-PS1-4

What is an element?

• A substance made of multiple types of atoms

• A substance made of only one type of atom

• A mixture of different molecules

• A compound of metals and nonmetals

Fill in the blank: Some substances are ________, a group of atoms that are held together by chemical bonds and act as a unit.

• elements

• compounds

• molecules

• mixtures

Tags

NGSS.MS-PS1-1

What is the main topic of Lesson 4?

• Chemical Reactions

• Molecular Structure

• States of Matter

• Periodic Table

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-4

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Which statement is true about metals and nonmetals according to the 'Before You Read' section?

• They have the same properties

• They have different properties

• They are always in a gaseous state

• They cannot form compounds

What makes nonmetal solids brittle and dull?

• A) High attraction between atoms

• B) Low attraction between atoms

• C) High temperature

• D) Low temperature

Atoms or molecules of nonmetal gases have ______ attraction to each other.

• high

• low

• medium

• no

What is the main topic discussed in the document?

• Properties of liquids

• Properties of metals and nonmetals

• Properties of gases

• Properties of solids.

Tags

NGSS.MS-PS1-4

Fill in the blank: The type of structure that forms between atoms of a metal and a nonmetal of opposite charges is called ______.

• A) Ionic bond

• B) Covalent bond

• C) Metallic bond

• D) Hydrogen bond

What happens to ionic compounds when they are hit with a force?

• They melt

• They dissolve

• They become brittle

• They expand