A Chemical Equation Is Balanced When ________

question 97

Multiple Choice

A chemical equation is balanced when ________.

• A)the total number of molecules is the same in reactants and products
• B)the total number of ions is the same in reactants and products
• C)the sum of the coefficients of the reactants is equal to the sum of the coefficients of the products
• D)the number of atoms of each element is the same in reactants and products
• E)the charge on each atom is the same in reactants and products

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Definitions:

Electroencephalograph (EEG)

A device used to measure and record the electrical activity of the brain.

Stage 3 Sleep

Stage 3 sleep is a period of deep, restorative sleep characterized by slow brain waves known as delta waves, essential for physical and mental rejuvenation.

Slowest Brain Waves

Refer to Delta waves, which are prominent during deep sleep and in very young children, indicating the slowest type of brainwave activity.

Stage 4 Sleep

The deepest phase of sleep, characterized by slow brain waves, during which the body recovers and grows.