Periodic Table- Serena Flashcards
(27 cards)
Protons
Found in nucleus and has a positive charge
Nucleus
Made up of protons and neutrons
Neutrons
Found in nucleus and has a negative charge
Electrons
On the rings and has a negative charge
Orbital
Where you find all the the electrons
Valence electron
Found in outer shell of an atom and it determines the chemical properties of the atom
Periodic law
Law that says the repeating physical and chemical properties
Period
The horizontal row
Group
The vertical row
Ion
An atom(s) that have lost or gained an electron
Atomic number
Number of protons in the nucleus
Mass number
Sum of the #’s of protons and neutrons in the nucleus
Isotope
An atom the has the same amount of protons as other atoms and has different amount of neutrons
Atomic mass unit (amu)
The hint of mass the describes the mass of an atom
Average atomic mass
Average of all the naturally occurring isotopes in an element
Metals
Shiny and conducts heat and electricity good
Nonmetal
Conducts heat and electricity bad
Semiconductor
Conducts the electric current better than an insulator but not Better than a conductor
Alkali metal
Group 1 on periodic table
Alkaline earth metal
Group 2 on periodic table
Transition metal
Group 3-12 on periodic table
Halogens
Group 17 on periodic table
Noble gases
Unreactive and group 18
Mole
Si base unit
