What is the definition of 'measurement' according to Britannica?

The process of associating numbers with physical quantities and phenomena.

The act of comparing two quantities.

The determination of an object's size.

The use of instruments to quantify observations.

How is 'accuracy' defined in the context of measurements?

The fact of being exact or correct.

How close measurements of the same item are to each other.

The number of significant figures in a measurement.

The difference between a measured value and the true value.

What does 'precision' refer to in measurements?

How close measurements of the same item are to each other.

The fact of being exact or correct.

The absence of errors in measurement.

The ability to measure very small quantities.

What do significant figures (Sig Fig) indicate?

The precision of a number, particularly in measurements.

The absolute error in a measurement.

According to SI unit rules, if a unit is named after a person, how should its full name be written?

Always starts with a capital letter.

Always starts with a small letter.

How should the symbol for a unit named after a scientist be written?

It depends on the number of letters.

What does the Law of Conservation of Matter state?

Matter cannot be created or destroyed, only changed in form.

Matter can be created but not destroyed.

Matter can be destroyed but not created.

Matter is always conserved in open systems.

What is the mass number of an atom?

The total count of protons and neutrons.

A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.

A single atom with a net electric charge.

A substance that cannot be broken down into simpler parts.

A mixture of two or more elements.

An atom or molecule that has gained or lost electrons, resulting in a net electrical charge.

A group of atoms bonded together without a charge.

What does a molecular formula provide?

The exact number of atoms of each element present in a single molecule.

The simplest whole-number ratio of atoms.

The arrangement of atoms and bonds.

The relative proportions of elements.

What does an empirical formula represent?

The simplest whole-number ratio of atoms in a compound.

The exact number of atoms of each element.

The spatial organization of atoms.

The total mass of the compound.

What is a ternary compound characterized by?

Containing three different elements.

Containing two different elements.

Containing only polyatomic ions.

Containing only metallic elements.

How are ternary compounds typically named?

By naming the cation first, followed by the name of the polyatomic anion.

By naming the anion first, followed by the cation.

By using prefixes to indicate the number of atoms.

By adding '-ide' to the end of the element names.

What is an atomic mass unit (amu) defined as?

1/12 the mass of an individual carbon-12 atom.

The average mass of all isotopes of an element.

What does the average atomic mass of an element represent?

The weighted average of the masses of all its naturally occurring isotopes.

The mass of its most abundant isotope.

The sum of protons and neutrons in its nucleus.

The mass of a single atom of that element.

How is molecular mass calculated?

By summing the atomic masses of all the atoms present in the molecule.

By subtracting the atomic masses of all atoms present.

By multiplying the atomic masses of all atoms present.

By dividing the total mass by the number of atoms.

Why is the relative atomic mass of carbon given as 12.01 amu and not 12 amu?

Because it accounts for the different isotopes of carbon and their relative abundances.

Because carbon atoms are not perfectly spherical.

Because of the mass of electrons.

REVIEW FOR Q1 GC1

Authored by Ariene May Urrete

Chemistry

12th Grade

Used 5+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best defines matter?

Anything that has energy and occupies space.

Anything that possesses mass and occupies space.

Anything that can be seen and touched.

Anything that undergoes chemical changes.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What percentage of the universe's total composition is estimated to be visible matter?

Approximately 95%

Approximately 50%

Approximately 5%

Approximately 1%

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a physical property?

Flammability

Reactivity

Melting point

Corrosivity

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a chemical property?

Density

Boiling point

Hardness

Oxidation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A property that depends on the amount of matter present in a sample is called:

Intensive property

Extensive property

Chemical property

Physical property

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an intensive property?

Mass

Volume

Temperature

Total energy

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of change occurs when ice melts into liquid water?

Chemical change

Nuclear change

Physical change

Irreversible change

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REVIEW FOR Q1 GC1

Which of the following best defines matter?

What percentage of the universe's total composition is estimated to be visible matter?

Which of the following is an example of a physical property?

Which of the following is an example of a chemical property?

A property that depends on the amount of matter present in a sample is called:

Which of the following is an intensive property?

What type of change occurs when ice melts into liquid water?

Burning wood is an example of what type of change?

Which state of matter has a definite shape and volume?

Which state of matter expands to fill any container and is highly compressible?

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