Flashcards
Periodic Table Unit
Cards in this deck (11)
- 1Atomic NumberGives the number of:
protons in the nucleus of an element
and
electrons around the nucleus - 2Atomic MassGives the mass of the element
and
│ Atomic mass – Atomic number │= number of neutrons in the nucleus - 3PeriodThe rows of the periodic table
The period number represents the number of electron shells the element will have - 4GroupThe columns of the periodic table
The group number represents the number of valence electrons the element will have - 5Alkali Metals1st column of the periodic table (except H)
Possess 1 valence electron
They are soft and highly reactive
They must be stored in oil
Never found in their pure state naturally - 6Alkaline Earth Metals2nd column of the periodic table
Possess 2 valence electron
THey make up the compounds of rocks
Highly malleable and reactive
Never found in their pure state naturally - 7HalogensBefore last column of the periodic table
Possess 7 valence electron
They are reactive
They are known as salt creators
Often used as cleaners or disinfectants - 8Noble Gases (or Inert gases)Last column of the periodic table
Possess 8 valence electron (except He which only has 2 valence electrons)
They do not react because their electron shell is full
They are found in their pure state naturally - 9MetalsElements to the left of the periodic table
(except Hydrogen)
Usually shiny, ductile, malleable
Often react with acids
Good conductors of heat and electricity - 10Metalloids7 elements forming a "staircase" in the periodic table
Semi-conductors
Properties depend on conditions - 11Non-metalsLocated to the right of the periodic table (including Hydrogen)
Mostly gases
Poor conductors of heat and electricity
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- Description
- Flash cards for the important definitions in relation to understanding the periodic table
- Created by
- Dannie Couture
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