The Periodic Table Flashcards
What is the name of second group in the periodic table?
The alkali earth metals
What is the name of seventh group of the periodic table?
The halogens
What is the name of eigth group of the periodic table?
The noble gases
Name three of the alkali metals?
Lithium, sodium and potassium
What are the properties of the alkali metals?
They are soft and easy to cut, conducts electricity, low denstiy, low melting point, stored in oil and tarnishes fast
Name three alkali earth metals?
Beryllium
Magnesium
Calcium
Why are alkali metals sl reactive?
Because one extra electron in their outer shell and they want to try to lose it
What are the properties of alkali earth metals?
They have two electrons un there outer shell but they aren’t as reactive as alkali metals
Name some of the halogens?
Fluorine and chlorine
What is the eord equation when alkali metals mix with oxygen?
Alkali metal:lithium
Lithium+oxygen=lithium oxide
What is the word equation when alkali metals mix with water?
Alkali metal:sodium
Sodium+Water=sodium hydroxide+hydrogen
How many electrons do the halogens have?
They seven and they are trying to gain an extra electron
Name three noble gases?
Helium, neon, argon
What are the properties of the noble gases?
They have a full outer shell, they are very stable and unreactive
Who created the periodic table?
Dimitri mendeleev
