Chemistry 1st Semester Review

Front

Compounds which have the same number of protons but different in the number of neutrons?

Back

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number.

Front

What is the maximum number of electrons a d subshell can contain?

Back

The maximum number of electrons a d subshell can contain is 10.

Front

Examples of this property include hardness, density, and malleability.

Back

These are examples of physical properties, which can be observed without changing the substance's chemical identity.

Front

The type of property in which the chemical composition or identity of the substance is changed.

Back

This is known as a chemical property, which involves a change in the substance's chemical structure.

Front

Examples of this property are: cutting, crushing, changing state.

Back

These are examples of physical changes, which do not alter the chemical composition of the substance.

Front

What is the definition of an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change affects one or more physical properties of a substance without altering its chemical composition, while a chemical change results in the formation of new substances.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas, each with distinct properties.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.