Which statement best explains why sodium chloride has different properties than sodium and chlorine?

Because sodium chloride is a compound formed from elements with different properties.

Because sodium chloride is a mixture (not chemically combined) of sodium and chlorine.

Because sodium chloride is an element like sodium and chlorine.

Because sodium chloride contains only sodium atoms.

Lesson Review! Which of the following statements is true about what we learned in this lesson?

Elements are made of a single atom (whether single or molecules)

Compounds are made up of two or more different atoms chemically combined into molecules

Chemical formulas provide us the "ingredients" list for a compound

Compounds have different properties than the individual elements that make them up

Elements are made up of two or more different atoms chemically combined into molecules

SSA Practice, Lesson 3, #1: Which model represents a pure substance?

Model 3 is a pure substance because it represents one type of compound.

Model 1 is a pure substance because it represents several elements.

Model 2 is a pure substance because it represents several elements.

Model 4 is a pure substance because it contains both elements and compounds.

SSA Practice, Lesson 3, #2: Hydrogen (H2) is a colorless, highly flammable gas, and Oxygen (O2) is a colorless gas that is necessary for combustion (burning). When these two elements react and chemically bond to form water (H2O), the resulting compound is a liquid at room temperature that is commonly used to extinguish fires. Which of the following best explains why the properties of water are so different from those of hydrogen and oxygen?

Chemical bonding creates a new substance with its own unique and definite chemical and physical properties.

The hydrogen and oxygen atoms are physically mixed, allowing them to share their original properties in a new state of matter.

The atoms of hydrogen and oxygen are destroyed during the reaction and replaced by brand new "water" atoms.

Water is a mixture, so it only appears to have different properties because the gases are dissolved in one another.

3.1 Lesson 3

Interactive Video

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Science

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8th Grade

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Practice Problem

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Medium

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NGSS

MS-PS1-1, MS-PS1-2, MS-PS1-5

Standards-aligned

Jamie Smythe

Used 13+ times

FREE Resource

26 questions

Show all answers

SLIDE QUESTION

1 min • Ungraded

SLIDE QUESTION

1 min • Ungraded

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which of the following best describes a pure substance?

A substance made of only one kind of atom or molecule with definite chemical and physical properties

A mixture of different elements and compounds

A substance that can be separated by physical means

A material with always changing chemical properties

LABELLING QUESTION

1 min • 4 pts

Label each image correctly.

element

compound

Which of the following is NOT a definite (characteristic/ size-independent) property of pure substances?

Density

Color

Boiling point

Conductivity

SLIDE QUESTION

1 min • Ungraded

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3.1 Lesson 3

26 questions

Which of the following best describes a pure substance?

Label each image correctly.

Which of the following is NOT a definite (characteristic/ size-independent) property of pure substances?

Organize these options into the right categories.

(a) changes alter the arrangement of atoms when looking at the starting versus ending materials. These changes produce "new" substances with their own "new" properties.

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3.1 Lesson 3

26 questions

Which of the following best describes a pure substance?

Label each image correctly.

Which of the following is NOT a definite (characteristic/ size-independent) property of pure substances?

Organize these options into the right categories.

​ (a) changes alter the arrangement of atoms when looking at the starting versus ending materials. These changes produce "new" substances with their own "new" properties.

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

(a) changes alter the arrangement of atoms when looking at the starting versus ending materials. These changes produce "new" substances with their own "new" properties.