Answer: Lead will be the least metallic of all the elements given.
Explanation: Metallic character is defined as the tendency of the metals to loose electrons easily.
The metallic character increases down the group and decreases across a period because the size of the elemnt increases down the group and decreases across a period.
Lead belong to Group 14 and Period 6 of the periodic table.
Mercury belongs to Group 12 and Period 6 of the periodic table.
Americium belongs to Group 8 and Period 7 of the periodic table.
Francium belongs to Group 1 and Period 7 of the periodic table.
Order of metallic character:
Francium > Americium > Mercury > Lead
From the order above, the lead will have the least metallic character.
Because water molecules are polar, water can dissolve many other polar substances. Water can also dissolve ionic compounds such as table salt.
Answer:
question 1,2,4
Explanation:
1. the composition of air are
nitrogen,oxygen,carbon dioxide nd inert or noble gases
2. yes cas it's increasing air pollution
4. some toys are educational while others are not so the answer is yes