Ions and Isotopes

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

How do you determine the number of electrons in a neutral atom?

Back

In a neutral atom, the number of electrons is equal to the number of protons.

Front

What is an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

Front

How do you calculate the atomic mass of an element?

Back

The atomic mass is the weighted average of the masses of all the isotopes of an element, taking into account their relative abundances.

Front

What is the charge of an atom with 34 protons and 36 electrons?

Back

The charge is -2, indicating that the atom has gained two extra electrons.

Front

What is the significance of the atomic mass number?

Back

The atomic mass number is the total number of protons and neutrons in an atom's nucleus.

Front

How many neutrons are in an isotope of carbon-13?

Back

Carbon-13 has 7 neutrons (13 - 6 protons = 7 neutrons).

Front

What is the relationship between protons and the identity of an element?

Back

The number of protons in an atom determines the element's identity; changing the number of protons changes the element.

Front

What is the difference between cations and anions?

Back

Cations are positively charged ions (lost electrons), while anions are negatively charged ions (gained electrons).

Front

How can you identify an isotope from its notation?

Back

An isotope is identified by its element symbol followed by its mass number (e.g., Carbon-13).