Chemistry test 1 Flashcards
kkbtkey term: Element
- most simple kind of pure substance
- approx. 118 known elements
- divided into metals and non-metals
key term: atom
a particle of matter that uniquely defines a chemical element.
key term: compound
Pure substance formed when atoms of different elements are bonded together
key term: molecule
a group of atoms bonded together
key term: bonded
attached/held together, attraction between atoms
key term: binary
two of something, made of only two different elements
key term: polyatomic
three or more of something, made of three or more different element
key term: ionic
a compound made of metals and non metals
key term: molecular/covalent
a compound made of only metals
key term: nomenclature
A system for naming, rules for writing names and formulas for compounds.
key term: multivalent
metals that have different chargers and/or valence numbers
key term:polyatomic ion
group of elements with a charge ex. (NO3)-1
key term: prefix
something that is added to beginning of a word to alter it or change it, used in molecular nomenclature to indicate number of atoms of each element
key term: acid
a compound that will separate and produce H + when dissolved in water
key term: binary acid
Acid that consiste of only two elements (one of which is water)
aqueous
dissolved in water, must indicate that it is aqueous using subscript next to formula
how many known elements are there
approx. 118, organized on periodic table
when it is a coefficient that means:
the atoms are NOT bonded together
What are Coefficiants used for in compounds
represent amount of molecules
what is special about hydrogen
hydrogen can act as a metal or non-metal even tough it is on left side of periodic table
who created nomenclature rules
jöns jacob Berzelius
Antoine-Laurent Lavoisier
Louis-Bernard Guyton De Morveau
what type of nomenclature is this and how do you know and what is the name: MgS
Binary ionic - it have 2 elements and one metal one non-metal
magnesium Oxide
what type of nomenclature is this and how do you know and what is it: Calcium Oxide
Binary Ionic - it have 2 elements and one metal one non-metal
CaO
what do you use to identify multivalent chargers
Roman numerals
