This activity is designed to classify matter based on its arrangment at the particle level (very very tiny level!). Work through each problem using problem solving skills to understand the differences between elements, compounds, and mixtures.
Question 1
1.
Draggable item
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Corresponding Item
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Question 2
2.
How many atoms are present in a molecule of H2O?
Question 3
3.
How many atoms of F are present in a molecule of BF3?
Question 4
4.
How many total molecules are found in the following particle diagram?
Question 5
5.
Two different molecules are represented below. How many different types of atoms are found in a sample of BF3 and H2O?
Question 6
6.
Question 7
7.
Read this for the next question: Matter is classified as a pure substance when all of the particles are identical. Matter is classified as a mixture if there are different particles present.
Question 8
8.
Read this for the next question: Elements are pure substances made from only one type of atom. Compounds are pure substances made from two or more types of atoms.
Question 9
9.
Question 10
10.
Question 11
11.
Question 12
12.
Question 13
13.
Question 14
14.
Based on what you know and observe from the following set of pictures, drag the following particle diagrams to match each picture.
Oxygen (O2)
Water (H2O)
Solid salt (NaCl)
Solid Sulfur (S)
Air
How many particles are represented in the following diagram?
2
3
4
What do the small numbers (the subscripts) in the codes represent?
The number of particles in a diagram
The number of atoms in a molecule
The number of molecules in a diagram
The number of molecules in a particle
Sort the particle diagrams into pure substances and mixtures.
Pure Substances
Mixtures
Sort the pure substances into compounds and elements.
Elements
Compounds
Identify whether the following is a compound, mixture, or element: NaHCO3
Compound
Mixture
Element
Identify whether the following is a compound, mixture, or element: C6H12O6 & H2O
Compound
Mixture
Element
Identify whether the following is a compound, mixture, or element: Cu & Zn
Compound
Mixture
Element
Identify whether the following is a compound, mixture, or element: CO2
Compound
Mixture
Element
Identify whether the following is a compound, mixture, or element: Al