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10thGr Exam Ch2 Q's
10th Grade 2015 Exam Ch 2 Questions
Question | Answer |
---|---|
What is matter? | Anything that has mass and takes up space |
What is the smallest unit of an element that has all the properties of the element? | atom |
A molecule of water is made from combining hydrogen and water how? | chemically |
What kinds of substances are pure substances? | elements and compounds |
What is the term for a substance that cannot be broken down into simpler substances by common chemical reactions? | an element |
Is a mixture a (pure) substance? | no |
The smallest unit of a substance that behaves like the substance is called a(n) .... | molecule |
How should clean air classified? | homogeneous mixture |
What should be the classification of a liquid that results from stirring one gram of salt into one liter of water until it disappears? | homogeneous mixture |
What do the chemical properties of a substance tell you about that substance? | How it can or can not react chemically |
Choose the material of highest density from an image showing particles spaced apart different amounts. | Highest density has the least amount of free space between particles. |
What are several physical properties of substances? | density, color, conductivity, melting point, mass, etc. |
What are several chemical properties of substances? | flammability, reactivity, ability to rust, etc. |