Atoms can be the source of both nuclear and chemical energy. Nuclear energy involves the atom's nucleus; chemical energy involves the atom's electrons—subatomic particles that surround the nucleus.
Answer:
Ni
Explanation:
An active metal is a highly reactive metal. Active metals are found high up in the activity series.
Active metals react with other metals that are lower than them in the activity thereby displacing the lower metals from a solution of their salts. This is what may have happened in the other two reactions.
Ni is the most active metal listed in the question since it can react a compounds with Pb(NO3)2(aq) to liberate Pb metal.
Metal solids contain a positively-charged cation surrounded by a "sea" of delocalised, negatively-charged electrons.
The electrons are able to move freely, and hence transfer kinetic energy throughout the implement at a much quicker rate than non-metals.
Plastic is made of non-metals (Mostly carbon and hydrogen) and therefore is a poor thermal conductor.
Therefore, by coating the metal utensil in plastic, the rate of heat energy transfer to the person in contact's hand is decreased.
Answer:
Here are some guidelines for disposal of the following categories.
1. Glass
• Broken glasses should be clean, without odors or chemical debris.
• It should be collected in a cardboard box which bottom is taped.
• The box should be closed
• Label box "CLEAN BROKEN GLASS FOR RECYCLING"
• Contact the Custodial Services for removal of the box.
2. Chemical waste after reaction & Unused chemical.
• Disposal of such chemicals must be disposed of corresponding to the instructions obtained from the manufacturer or better still through licensed chemical removal company.
• A plan for disposal and procedures for chemicals disposal should be known before they are purchased.
• Based on the classification some waste should be held in the laboratory while others shouldn't be disposed during day light the characteristics of the solution.
• Overstock should be given to neighboring schools.
Explanation:
