Periodic Table Lesson 2

Reactivity trend in Group 1

Reactivity increases as you move down Group 1

Reactivity trend In group 17

As you go down the group, the reactivity decrees.

How alkali metals are stored and why

all alkali metals are stored in mineral oii bc they react so violently and readily with oxygen and water vapor.

2 forms of phosphorus

white and red

Most and least reactivity non metals in group 17

F is the most reactive, l is the least reactive.

How we obtain nitrogen from air (explain nitrogen fixation)

Nitrogen fixation is when bacteria breaks down nitrogen in the air mixes with the soil.

Carbon group

All elements in the carbon group are metals or metalloids except carbon, which is a nonmetal. Carbon is found in all living things. 2 forms are diamond and graphite.

Halogen group

Halogen elements from salts with sodium and with other alkali metals. Halogen = salt former

Alkali metals

Silvery solids with low dentism and low melting points.

Alkaline earth metals

Elements are denser, harder, and have higher melting points and are slightly less reactive than alkali metals in the same period.

Know the uses of the following elements or compounds. There are 6

• a. Aluminum, b.Ammonia, c. Lithium d. Selenium e.Silicon, f. Sulfur

whats reactivity

reactivity had a tendency to combine with other substances.