Ions and Isotopes

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How many valence electrons does Chlorine [Cl] have?

Back

Chlorine [Cl] has 7 valence electrons.

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.

Front

Which is the heavier isotope of Chlorine: Cl-35 or Cl-37?

Back

Cl-37 is the heavier isotope of Chlorine.

Front

How do you calculate the number of neutrons in an isotope?

Back

Number of neutrons = Atomic mass - Atomic number.

Front

If an isotope has an atomic mass of 26 and an atomic number of 12, how many neutrons does it have?

Back

It has 14 neutrons.

Front

What is a cation?

Back

A cation is a positively charged ion that has lost one or more electrons.

Front

What charge do cations carry?

Back

Cations carry a positive charge (+).

Front

Do isotopes of the same element behave the same chemically?

Back

Yes, isotopes behave the same chemically but may differ in physical properties.

Front

What is the difference between isotopes and ions?

Back

Isotopes differ in the number of neutrons, while ions differ in the number of electrons.