Unit 1 lesson 14 intro to periodic tablePresentation Transcript
What is the periodic table?• The periodic table is a chart of the elements arranged into rows and columns according to their physical and chemical properties.• It can be used to determine the relationships among the elements.
Atomic Number Atomic Number 11 11NaNa Element symbol Element symbol Sodium Sodium 22.990 22.990 Element name Element name Atomic Mass Atomic Mass 11 11 Atomic # = ______ 22.990 22.990 Atomic Mass = _________ 23 23 Mass # = _________ 11 11 # of Protons = ________ 12 12 # of Neutrons = ________ 11 11 # of Electrons = ________
Arranged according Arranged accordingto similarities to similaritiesor patterns or patterns
Today’s Periodic TableYou can identify many of the properties of anelement from its placement on the periodictable.
The table is organized into columns, rows, andblocks, which are based on certain patterns ofproperties.
Today’s Periodic Table (cont.)• A group is a column on the periodic table.• Elements in the same group have similar chemical properties and react with other elements in similar ways.
Today’s Periodic Table (cont.) What can you infer about the properties of two elements in the same group?
Today’s Periodic Table (cont.)• The rows on the periodic table are called periods.• The atomic number of each element increases by one as you read from left to right across each period.