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# 3.4: Multimedia Resources for Chapter 3

Difficulty Level: At Grade Created by: CK-12

Copy and distribute the lesson worksheets. Ask students to complete the worksheets alone or in pairs as a review of lesson content.

## Elements, Compounds, and Mixtures Worksheet

1. Identify each of the following as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

(a) water _______________
(b) pure air _______________
(c) salad dressing _______________
(d) chromium _______________
(e) gasoline _______________
(f) brass _______________
(g) salt water _______________
(h) iron _______________
(i) protein _______________
(j) mud _______________
(k) sand and gravel _______________
(l) pepsi cola _______________

2. Answer the following questions about one molecule of sulfuric acid, $H_2SO_4$.

(a) How many different elements are in the molecule? _____
(b) Name the elements present. ______________________________
(c) How many atoms of oxygen are in the molecule? _____
(d) What is the total number of atoms in the molecule? _____

3. Identify each of the following as an element or not an element and for those that are elements, further identify them as a metal or a non-metal.

(a) granite
(b) carbon
(c) francium
(d) bronze

4. The structural formula shown below is 1,1,3-trichloro-2-butene.

(a) What elements are present in this compound? ____________________
(b) How many hydrogen atoms are present in one molecule of this compound? _____
(c) What is the molecular formula for this compound? __________

## Answers to Worksheets

• The worksheet answer keys are available upon request. Please send an email to teachers-requests@ck12.org to request the worksheet answer keys.

## Date Created:

Aug 18, 2012

Sep 03, 2015
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