• Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/13

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

13 Cards in this Set

  • Front
  • Back
Main group elements
Elements in Group 1, 2, 13-18
The electronic configuration of each element are regular and consistent.
Also called representative elements because they have wide range of properties.
Solids/liquids/gases ( at room temp.)
Most are metals
Most are extremely reactive.
Silicon & Oxygen are most commonly found on Earth.
Four groups within the main-group elements have special names. These groups are:
alkali metals (Group 1)
alkaline-earth metals (Group 2)
halogens (Group 17)
noble gases (Group 18)
alkali metals (Group 1)
-React with water to form Alkaline solutions.
-Contain 1 V.E ( Valence Electron)
-Highly reactive ,usually stored in oil.
-Never found in pure form because of high reactivity.
-Very soft and can be cut with knife.
-Cut surface is shiny .
-Good conductors of electricity.
alkaline-earth metals (Group 2)
-Highly reactive
-Usually found as compounds
-Have 2 VE
-Harder than group 1 elements
-High m.p
Halogens- Group 17
-Non metals
-Highly reactive
-7 V.E
-React with metals to produce salts.
-Metal+ Halogen = Salt
-Na + Cl = NaCl
-Can be solids/ liquids or gases at room temperature.
-Fluorine & chlorine = gases
-Bromine = liquid
-Iodine & Astatine = solid
-unreactive
-were called inert gases
Hydrogen- a class by itself
-Contains 1 proton, 1 electron, 0 neutrons
-Behaves unlike any element
-Reacts with many elements.
H2 + O2  H2O ( Explosive reaction )
-Is a major component of
-all living things
-Ammonia ( Used as fertilizers)
Properties of metals
-Good conductors of electricity & heat.
-Some metals are brittle, malleable and ductile.
Melting Point (m.p)
Tungsten has the highest m.p
Mercury has low m.p
Alloys
Metals can be mixed with other elements (solids)to make alloys.
�
Metals can be mixed with other elements (solids)to make alloys.
-Also called as “ d” block elements.
-T.M in each group do not have similar electronic configuration.
-Looses different V.E depending on the element with which it reacts.
-Less reactive than Group 1 and Group 2 elements.
-Show malleability, ductility & are good conductors of heat & electricity.
Lanthanides &Actinides: Lanthanides
-Follow the element Lanthanum.
-Shiny metals.
-Some lanthanide metals are used to make Color TV screens
Lanthanides &Actinides: Actinides
-Follows the element actinium
-Nuclei are unstable and break apart.
-All are radioactive.