Structre of Atoms Flashcards
What is the definition of relative formula mass?
The sum of the relative atomic masses of all the atoms in the chemical formula
What is the definition of atomic mass?
The average mass of the isotopes of an element compared with the mass of an atom of carbon-12
What is the definition of an isotope?
Atoms the same number of protons but different number of neutrons
Why are the chemical properties of isotopes identical?
How it reacts is determined by the number of electrons in the outer energy level
Have same physical properties but different chemical properties
How do you calculate the average relative atomic mass of isotopes?
Times the relative atomic mass by percentage
Divide by 100
What is a monatomic ion?
One atom in the ion
What is a polyatomic ion?
Many atoms in the ion
