Ch 11
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of electrons
The number of electrons in an atom of a given element is the same as the elements atomic number
of shells
For atoms of a given element the number of shells that contain electrons will be the same as the period number.
Valence shell
The outer shell
of valance electrons
The number of valance electrons is the same as the group number
Period
Row
Group
Column
What does the period number tell you and which direction does it go?
• The period is the rows going from left to right - The period number tells you the number of electron shells
What is a Lewis Dot structure?
The Lewis dot structure has the symbol for the element in the center and dots representing the number of electrons in the outside shell (valence electrons) arranged on the symbol like its a clock at the 12, 3, 6, and 9 spots.
Where are the groups on the periodic table? And what do the groups tell you?
The groups are the columns going up and down (skip the center columns after #2)
What is the difference between mass number and atomic mass?
Mass number is the number of protons and neutrons atomic mass is the weighted average of all isotopes of an element
What kinds of bonds are hydrogen and chlorine likely to form? Why
They are likely to form an ionic bond because there are more than 2 squares separating them which implies a large difference in electronegativity
What kind of a bond are carbon and oxygen likely to form? Why?
They are likely to form a covalent bond because they are 2 or less spaces on the periodic table apart which implies that they have similar electronegativity