Isotopes and Ions Flashcard

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons, resulting in a different atomic mass.

Front

How do you determine the number of electrons in an ion?

Back

To find the number of electrons in an ion, subtract the charge of the ion from the atomic number. For example, if an atom has a charge of +2 and an atomic number of 8, it has 6 electrons.

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 many protons does an atom of titanium have?

Back

An atom of titanium has 22 protons.

Front

What happens when you add or subtract neutrons from an atom?

Back

Adding or subtracting neutrons changes the atom into an isotope of the same element.

Front

What is a neutral atom?

Back

A neutral atom has an equal number of protons and electrons, resulting in no overall charge.

Front

How many neutrons are in an atom with an atomic number of 8 and a mass number of 20?

Back

To find the number of neutrons, subtract the atomic number from the mass number: 20 - 8 = 12 neutrons.

Front

What is the charge of an ion with 10 protons and 8 electrons?

Back

The charge of the ion is +2, because there are 2 more protons than electrons.

Front

How many electrons are in a neutral atom of potassium (K)?

Back

A neutral atom of potassium (K) has 19 electrons.

Front

What is the mass number of an atom?

Back

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