Chemistry Introduction

What is a Substance?

• A Combination of Two or more Substances that are not Chemically Combined.

• A Single Kind of Matter that is Pure and has a Specific set of Properties.

• All of the Above.

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Which Ones are Physical Properties and Changes?

• Marshmallows Burning.

• A Moldy Cheese Smell.

• Crushing a Can.

• Melting an Ice Cube.

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In which state of matter do particles have the most energy?

• Liquid state

• Gaseous state

• Plasma state

• Solid state

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How many protons are in a carbon atom?

• 4

• 10

• 8

• 6

What is the chemical formula for water?

• H2O

• HO

• O2

• H2

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What is the chemical formula for carbon dioxide?

• CO

• CO2

• OC

• CCO

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What is the smallest unit of matter?

• Molecules

• Cells

• Planets

• Atoms

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Give an example of a chemical change.

• Iron rusting

• Boiling water

• Mixing salt and sugar

• Cutting paper

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What is the symbol for gold on the periodic table?

• Au

• Fe

• Pt

• Ag

What is the pH scale used to measure?

• volume of a solution

• acidity or alkalinity of a solution

• density of a solution

• temperature of a solution