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.

Fill in the Blanks

What is the total number of atoms in the formula 2H2SO4?

Fill in the Blanks

How many atoms are in the formula Al2(SO4)3?

Fill in the Blanks

What is the total number of atoms in the formula 2Al2(SO4)3?

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

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​Atomic Model of Sucrose