groups of elements

Question 1

Alkali metals:

Answer 1

Alkali metals:

• Group 1
• Lithium, Potassium, Sodium
• Highly reactive in water
• Outer valence level have one electron
• Lose electron (+1)
• Found as compounds

Question 2

Alkaline earth metals:

Answer 2

Alkaline Earth Metals:

• Group 2
• Beryllium,Magnesium,Calcium
• Not as reactive as alkali metals
• Contains 2 electrons in the outer shell

Question 3

Halogens:

Answer 3

Halogens:

• Group 17
• Most reactive non-metal
• Found as compounds
• Outer orbits have 7 electrons
• Needs to gain one electron +(-1) to be stable

Question 4

Noble gases:

Answer 4

Noble Gases:

• Group 18
• Far right column
• Called inert gases
• Unreactive
• Rarely form chemical compounds
• Outer orbits are full

Question 5

Hydrogen:

Answer 5

Hydrogen: The Special Group of 1
-Can be placed in group 1 or 18
-Single proton and no neutron
-One electron is its outer orbit 
-Needs to gain 1 electron to be 
stable