Counting

In a chemical reaction, the number of atoms of each element is conserved. This principle is known as:

• Law of Conservation of Mass

• Law of Definite Proportions

• Law of Multiple Proportions

• Law of Conservation of Energy

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When counting the number of protons in an atom, you are determining the atom's:

• Atomic number

• Mass number

• Isotope number

• Valence number

In a balanced chemical equation, the coefficients indicate the:

• Number of molecules

• Number of atoms

• Number of ions

• Number of electrons

The process of counting the number of neutrons in an atom involves subtracting the atomic number from the:

• Mass number

• Atomic mass

• Electron number

• Proton number

Avogadro's number is used to count the number of:

• Atoms in a mole

• Molecules in a gram

• Electrons in an atom

• Protons in a nucleus

In biology, counting the number of chromosomes in a cell is crucial for understanding:

• Genetic inheritance

• Cell metabolism

• Protein synthesis

• Enzyme activity

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The counting of bacterial colonies on an agar plate is a method used to estimate:

• Bacterial population

• Cell size

• Growth rate

• Mutation rate

In physics, counting the number of oscillations of a pendulum helps determine its:

• Frequency

• Amplitude

• Velocity

• Acceleration

Counting the number of valence electrons in an atom helps predict its:

• Chemical reactivity

• Atomic mass

• Nuclear stability

• Magnetic properties

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In ecology, counting the number of individuals in a species within a habitat is known as:

• Population density

• Biodiversity index

• Carrying capacity

• Ecological footprint