Answer:
the properties of three undiscovered elements is the correct answer.
Explanation:
After he completed his work Mendeleev predicted the properties of the undiscovered elements.
In the year 1871, Dmitri Mendeleev predicted the detailed existence and the properties of the three elements that are undiscovered and he gained tremendous fame.
He left the gap in the table to put the elements which are not identified at that time and by glancing at the physical and chemical properties of an element next to the gap, Mendeleev could predict the properties of the not discovered elements.
The bond formed between two or more electrons of different atoms is called a COVALENT BOND.
Translation: List at least 5 objects that were formerly made from another material and are now made from a polymer. Identify what polymer it is
Answer:
Five object now replaced with polymers
1) automobile body parts. (polypropylene, polyurethane and PVC)
2)TV cabinets. (polystyrene polymer)
3) composites for golf clubs. (carbon fibre reinforced polymer CFRP)
4) fibers for clothing and carpet. (acrylic and nylon)
5) foams for coffee cups (polystyrene)
The organic product formed when the formic acid and 2-methyl-1-propanol compounds undergo a substitution reaction is 2-methylpropyl Methanoate.
<h3>What is Substitution reaction? </h3>
Substitution reaction is a reaction in which one group substitute the functional group of another organic compound or it can also be defined as a reaction that involves the replacement of one atom or group of atoms of a compound with another atom or group of atom.
<h3>Types of Substitution reaction</h3>
Substitution Reactions are basically of two types:
nucleophilic reaction and electrophilic reactions. These two types of substitution reactions differ in the types of atom that is attached to its original molecule. In the nucleophilic reactions, the atom is electron-rich species, on the other hand, in the electrophilic reaction, the atom is an electron-deficient species.
When the formic acid and 2-methyl-1-propanol compounds undergo a substitution reaction, esterification take place. Therefore, the product formed is an ester.
Thus we found that the organic product formed when the formic acid and 2-methyl-1-propanol compounds undergo a substitution reaction is 2-methylpropyl Methanoate.
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