section 1 Alyssa Flashcards
Protons
Positive charge in a atom found in nucleus
Nucleus
Center of a atom made up of protons and neutrons
Neutrons
No charge found in nucleus of atom
Electron
Negative charged particle
Orbital
Area in a atom where you will most likely find electrons
Valence electron
Electron found on outside shell of a atom and it determines the chemical prosperities of that atom
Periodic law
Law that states the repeating chemical and physical prosperities of elements change periodically with the atomic numbers
Period
Horizontal row of elements on the periodic table
Group
Vertical column of elements on the periodic table they share similarities
Metal
Element that conducts heat and electricity well
Nonmetal
Element that conducts heat and electricity not very well
Semiconductor
Element or compound that conducts electric current better than a insulator
Alkali metal
Group 1 on periodic table an element
Alkaline-earth metal
Group 2 on periodic table elements
Transition metal
Metals that can use inner shell before using the outer shell to bond
Halogen
Group 17 on the periodic table elements
Noble gas
Unreactive element group 18
Ion
A atom that has gained or lost one or more electrons and has a negative or positive charge
Atomic number
Number of protons in the nucleus of a atom
Mass number
The sum of numbers of protons and neutrons in a atom
Isotope
A atom that has the same number of protons
Atomic mass unit
A unit of mass that describes the mass of a atom
Average atomic mass
Weighted average of the masses of naturally occurring isotopes of a element
Mole
SI base unit to measure the amount of a substance
Avogadros constant
Equals 6.02x10^23 the number of particles in 1 mol
Molar mass
Mass in grams of 1 mol of a substance
Conversion factor
A ratio that is derived from the equality of two different units and that can be used to convert from one unit to another
