Retake- Atoms Ions and Isotopes

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element. It consists of a nucleus made of protons and neutrons, surrounded by electrons.

Front

What is 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 an isotope?

Back

An isotope is a variant of a particular chemical element that has the same number of protons but a different number of neutrons.

Front

How do you determine the number of neutrons in an atom?

Back

The number of neutrons can be determined by subtracting the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number).

Front

What is the charge of a positive ion?

Back

A positive ion, or cation, has a net positive charge due to the loss of one or more electrons.

Front

What happens to an atom when it gains an electron?

Back

When an atom gains an electron, it becomes a negative ion, or anion, with a net negative charge.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the significance of the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, reflecting both the number of protons and neutrons.

Front

What is the charge of aluminum after losing 3 electrons?

Back

Aluminum will have a charge of +3 after losing 3 electrons.

Front

What is the difference between a neutral atom and an ion?

Back

A neutral atom has an equal number of protons and electrons, while an ion has an unequal number, resulting in a net charge.