Isotopes/ Atomic mass units/ Avogadro's number Flashcards
What is the atomic mass unit defined as?
A unit of mass used to express atomic and molecular weights
What are the isotopes of hydrogen?
Protium, Deuterium, Tritium
What is an isotope?
Atoms of a single element, due to the difference in neutrons in their nuclei.
What is the Avogadro’s number ?
It represents the number of units in a single mole of any substance which is 6.022E23
What is a mole?
Number of atoms there are in 1 mole of element, equals to 6.022E23
What is the atomic number?
Symbolized by “Z”, Refers to the number of protons in a nucleus.
What is a neutral atom?
An atom that has the number of proton equals to the number of electrons
What is protium?
Hydrogen atom that has no neutron.
What is deuterium
Hydrogen atom that has 1 neutron.
What is tritium?
Hydrogen atom that has 2 neutrons.
What is the atomic mass number?
The total of neutrons and protons.
What does the atomic mass number equal to?
It equals to 1/12 the mass of an atom of carbon-12, approximately 1.66E-27 kg
What does the subscript of an element represent?
The atomic number.
What does the superscript of an element represent?
The atomic mass.
