Exploring Atoms, Elements, and Molecules

The video tutorial explains that atoms are the smallest units of matter, forming the basis of all substances. There are 118 different types of atoms, known as elements, each with a unique symbol found on the periodic table. Atoms can form pure substances or combine through chemical bonds to create molecules. Chemical formulas represent these molecules, indicating the types and numbers of atoms present. Examples include water (H2O), carbon dioxide (CO2), and glucose (C6H12O6). The video also highlights that the differences in matter arise from the number, type, and arrangement of atoms.

What is the smallest unit of matter?

• Molecule

• Atom

• Compound

• Element

How many different types of atoms are there?

• 200

• 118

• 100

• 50

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What is the symbol for gold?

• G

• Au

• Go

• Ag

What is a chunk of pure gold made from?

• Gold elements

• Gold compounds

• Gold atoms

• Gold molecules

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What do atoms form when they join together through chemical bonds?

• Mixtures

• Compounds

• Elements

• Molecules

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What does the chemical formula H2O represent?

• One hydrogen atom and two oxygen atoms

• One hydrogen molecule and two oxygen molecules

• Two hydrogen atoms and one oxygen atom

• Two hydrogen molecules and one oxygen molecule

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NGSS.MS-PS1-1

What is the chemical formula for carbon dioxide?

• C2O

• CO

• C2O2

• CO2

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How many oxygen atoms are in an oxygen molecule (O2)?

• Four

• Three

• Two

• One

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What is the chemical formula for glucose?

• C6H6O12

• C6H12O6

• C12H12O6

• C12H6O6

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NGSS.MS-PS1-1

What factors differentiate one form of matter from another?

• Temperature, pressure, and state

• Color, shape, and size

• Number, type, and arrangement of atoms

• Weight, density, and volume

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