Question

anwser keyClick on Alkali Metals (left bar) and answer the following questions. a. What is the group number? _____________. Are these metals reactive? ______________ b. Do these metals occur freely in nature? _____________ c. How many electrons are in their outer shell? _____________ d. What are the three characteristics of ALL metals? _________________________________________ ___________________________________________________________________________________ . e. Are these metals soft or hard? _____________ f. Name the two most reactive elements in this group? ________________ And _________________ g. What happens when they are exposed to water? _________________________________________ . wab quest answer key

Answer 1

Explanation:

Alkali metals are the metals which belong to group 1 of the periodic table. As these elements have one valence electron so they are highly reactive in nature.

Some characteristics of metals are as follows.

• Usually metals are hard in nature.
• They have shiny surface.
• Metals are malleable and ductile in nature.
• Metals are good conductors of heat and electricity.

When these metals react with water then it leads to the formation of metal hydrides.

For example, $Li + \frac{3}{2}H_{2}O \rightarrow LiOH + H_{2}$

Thus, we can conclude the following for alkali metals:

a. What is the group number? - Group 1.

Are these metals reactive? - Yes

b. Do these metals occur freely in nature? - No

c. How many electrons are in their outer shell? - 1 valence electron

d. What are the three characteristics of ALL metals?

• Usually metals are hard in nature.
• They have shiny surface.
• Metals are malleable and ductile in nature.

e. Are these metals soft or hard? - Both

f. Name the two most reactive elements in this group? - Lithium And  Sodium

g. What happens when they are exposed to water? - They form hydrides.