periodic table Flashcards
how many letters does a symbol consist of?
1 or 2
the first letter is always capitalized
the second letter is always not capitalized
how are elements listed on the table?
according to atomic numbers
what is atomic number?
the number of protons in an atom
what is an atomic number equal to?
- number of protons
- number of electrons
what is atomic mass?
the average mass of isotopes in an element
where does most of the atoms mass come from?
protons and neutrons
does atomic mass increase or decrease in the order of atomic number?
increase
what is mass number?
the sum of all protons and neutrons in the nucleus of an atom
how is the number of neutrons calculated?
mass number- number of protons
how is mass number calculated?
number of protons+ number of neutrons
if you take the atomic mass on the periodic table and round it to the nearest whole number, what do you have?
the mass number
what is the top number in the atomic notation symbol?
mass number
what is the bottom number in the atomic notation symbol?
atomic number
what are the letter(s) in the atomic notation symbol?
the element symbol
what are the number(s) in the top left of the atomic notation symbol?
the atomic number
