Ions and Isotopes Review 3rd

Front

What is an ion?

Back

An ion is an atom that has gained or lost electrons.

Front

How many electrons does a magnesium ion have if it has a charge of +2?

Back

10 electrons.

Front

Can an atom of Hydrogen have 2 protons?

Back

No, because protons identify the atom.

Front

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

Back

Number of neutrons = Atomic mass - Atomic number.

Front

How many neutrons are in Uranium-235?

Back

143 neutrons.

Front

Can an atom of Helium have 3 neutrons?

Back

Yes, because it can be an isotope.

Front

What defines an isotope?

Back

Isotopes are atoms of the same element with different numbers of neutrons.

Front

What is the charge of a cation?

Back

A cation has a positive charge.

Front

What is the charge of an anion?

Back

An anion has a negative charge.

Front

How many protons does a neutral atom of Carbon have?

Back

6 protons.