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Phy Sci Unit C7+

Periodic table, bonding, acids and bases

QuestionAnswer
Mendeleev created the first periodic table by arranging elements in order of increasing ____ ____. atomic mass
In Mendeleev's periodic table, everything in a column has similar properties
Where are metals on the periodic table? left of the zigzag line
Metals have what properties? shiny (luster), solids (all but Hg), ductile, malleable, and good conductors
Where are nonmetals on the periodic table right of the zigzag line
Most elements on the periodic table are what state of matter solids
Where are metalloids on the periodic table? along the zigzag line
Nonmetals have what properties? brittle solids and gases, non-conductors
Nuclear fusion created new elements inside what? stars and supernova
On the periodic table on the wall, what color are gases red
Metals are located left to the zig zag line
Valence electrons are found where farthest from the nucleus in the outer energy level
Elements in a row on the periodic table are in a _______ period
Columns on the periodic table are called what? family. groups
What information in the table indicates the number of protons in an atom the elements atomic number
Family 1 is called what? Alkali metals
Family 2 is called what? Alkaline earth metals
Elements that share characteristics of both metals and nonmetals are called what? metalloids
The modern periodic table is arranged by atomic number
Family 17 is called what? halogens
Family 18 is called what? noble gases
Families 3-12 are called what? transition metals
How many valence electrons for family 17 7
Nonmetals are _______ conductors heat and electricity poor
Which family is made of soft metals that react with water Family 1 or the Alkali metals
1800s who arranged the periodic table Dmitri Mendeleev
Each chemical elements is given a specific ------- that usually consist of one or two letters symbol
Metals are usually what state of matter? solids
Chlorine is in family ___ and period ___ 17 (halogens), 3
Sodium is in family ___ and period ___ 1 (alkali metals), 3
Barium is in family ___ and period ___ 2 (alkaline earth metals), 6
How many valance electrons would go around the symbol for barium in the Lewis electron dot structure? 2
How many valance electrons do the noble gases have? 8 (Except He has 2)
Because the noble gases have a full valance energy level, they are ______. nonreactive
atoms with a charge are called what? ions
In and ____ bond, one atom gives up electrons becoming positive, and another atoms gets those electrons becoming negative, then they are attracted by opposite charges. ionic
Covalent bonds are formed by the ____ of electrons sharing
Na and Cl form a(n) ___ bond to make NaCl (sodium chloride or table salt) ionic (metal plus nonmetal)
C and O form a(n) ___ bond to make CO2 (carbon dioxide) covalent (all nonmetals)
Ionic bonding involves the ____ of electrons transfer
In a chemical formula the number of each element is show by what? subscripts (small numbers following each element)
Bases are ionic compounds that release what ion into water? OH- (hydroxide)
Acids are compounds that release what ion into water? H+ (hydrogen ion)
These are corrosive, taste sour, and have a pH less that 7 acids
These are corrosive, slippery, bitter, and have a pH over 7 bases
Created by: tbrandt