Alkali metals
What are lithium, sodium, potassium, rubidium, cesium, and francium?
These Group 1 elements (except hydrogen) are called alkali metals.
What is oxidation?
Alkali metals are stored under oil or kerosene to prevent this process.
What are beryllium, magnesium, calcium, strontium, barium, and radium?
These Group 2 elements are called alkaline earth metals.
What is having one valence electron (ns¹)?
This property explains why alkali metals form +1 charged ions.
What is the flame test?
This test is used to identify alkali metal compounds by flame color.
What is +2?
Alkaline earth metals form ions with this charge.
What are alkali metals?
These metals are soft and can be cut with a knife.
What are acids in alkali metals?
These substances react with alkali metals, but bases do not.
What are two valence electrons?
This number of valence electrons is present in alkaline earth metals.
What is cesium?
This alkali metal is considered the most reactive stable metal.
What is sodium peroxide (Na₂O₂)?
Sodium reacts with excess oxygen to form this compound.
What are alkaline earth metals?
These metals are malleable, ductile, and good conductors of heat.
What is the free metallic form?
Alkali metals are never found in this form in nature.
What is a superoxide?
Potassium reacts with oxygen to form this type of compound.
What is reaction with halogens?
This reaction forms metal halides in alkaline earth metals.