Group 1- Alkali metals Flashcards
What does group 1 stand for?
Alkali metals
What metals are in group 1?
Hydrogen, Lithium, Sodium, Potassium, Rubidium, Caesium, Francium
What are the properties of the group?
They oxidise in the air,Can burn, shiny in color. The more shells of electrons, the more reactive they are. Soft to cut and very reactive.
What is the one element that behaves slightly differently to the other metals?
Hydrogen, and Caesium lights on fire in oxygen.
Describe the reactivity trend of group 1 metals.
The reactivity of group 1 elements increases as you go down the group because the atoms become larger, which means that the outer electron becomes further from the nucleus. This then means that the electric attraction between the postings nucleus and the outer negative electron decrease in strength.
As a result the outer electron will be lost more easily, meaning the element will be more reactive. The reactivity increases, the melting and boiling points decrease.
What is the reactivity trend for group 1 metals and water?
It reacts vigorously, and The products formed are metal hydroxide and hydrogen. From potassium down, so much energy is released, that they ignite. Potassium burns a lilac flame.
What is an example word equation?
Lithium+ water = lithium hydroxide + hydrogen
What is an example of a balanced symbol equation for the reaction of lithium and water?
2Li(s)+2H20(l) = 2LiOH(aq) + H2 (g)
What is the general word equation for when alkali metals react with water?
Alkali metal+ water = Alkali metal hydroxide
+hydrogen.
What is the compound formed when Lithium reacts with oxygen?
Lithium oxide ( Li2O)
What is the compound when sodium reacts with oxygen?
Sodium oxide (Na20) or sodium peroxide, (Na202)
What is the compound when potassium is reacted with oxygen?
Potassium peroxide (K202) or potassium superoxide (KO2)
What is the ionic salt called when sodium reacts with group 7 chlorine?
Sodium chloride
What is generally the color of an ionic salt?
White
What is an ionic compound?
When a metal atom, donates an electron to a non-metal atom, so both of them have full outer shells. The two atoms will then become oppositely charged atoms, and be attracted to each other, by electrostatic forces ( called and ionic bond) and so together make and ionic compound.
