Counting Atoms and Elements Powerpoint

Open Ended

Why do you think scientists use the stick and ball method to illustrate chemicals?

Multiple Choice

What is an atom?

• An atom is the smallest unit of matter that retains the properties of an element.
• An atom is a form of energy that can be harnessed.
• An atom is a large particle made of protons and neutrons.
• An atom is a type of molecule.

Multiple Choice

How many atoms of an atom are present if there is no subscript?

• 2
• 1
• 0
• 3

Multiple Choice

What is the difference between coefficients and subscripts in chemical formulas?

• Coefficients indicate the type of atoms; subscripts indicate the type of molecules.
• Coefficients are used for balancing equations; subscripts are used for naming compounds.
• Coefficients represent the number of atoms; subscripts represent the number of molecules.
• Coefficients represent the number of molecules; subscripts represent the number of atoms in a molecule.

Carbon atoms-12
Hydrogen atoms-21
Oxygen Atoms-11

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​Atomic Model of Sucrose