Final Exam physical Science Fall 2024

Front

What is an inference?

Back

An inference is a conclusion drawn from observations or evidence, rather than direct observation.

Front

What determines the identity of an element?

Back

The identity of an element is determined by the number of protons in its nucleus.

Front

What is an observation in scientific terms?

Back

An observation is a statement based on what one can see, hear, or measure directly.

Front

What are valence electrons?

Back

Valence electrons are the subatomic particles found in the outermost shell of an atom, responsible for its chemical reactivity.

Front

What is a good example of a conductor?

Back

A good example of a conductor is metal, which allows electricity to flow through it easily.

Front

What is the difference between observation and inference?

Back

Observation is based on direct evidence, while inference is a conclusion based on observations.

Front

What role do neutrons play in an atom?

Back

Neutrons are subatomic particles that contribute to the mass of an atom and help stabilize the nucleus.

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number and identity of an element.

Front

How do valence electrons affect chemical bonding?

Back

Valence electrons are involved in forming bonds between atoms, influencing the reactivity and properties of substances.

Front

What is a property of metals as conductors?

Back

Metals have free electrons that allow them to conduct electricity efficiently.