3) In hardware design, a prototype is a hand-built model that represents a manufactured (easily replicable) product sufficiently for designers to visualize and test the design. The word prototype comes from the Latin words proto, meaning original, and typus, meaning form or model.
In chemistry, a salt is an ionic compound which is made up of two groups of oppositely charged ions. The ion with a positive charge is called a cation, and the one with a negative charge is called an anion.
The word salt is a general chemical term that refers to ionic compounds formed when an acid reacts with a base. They may be simple salts such as. A large pile of salt at an Uppington, South Africa, salt mine. NaCl, KCl, and Na 2 SO 4; acid salts like NaHCO 3 and NaH 2 PO 4; or double salts like KAl(SO 4) 2.Table salt is sodium chloride, a chemical compound with the formula NaCl. Sodium chloride has been used to flavor and preserve food for thousands of years.As a result, salt became an essential part of commercial transactions and was often used as money or barter. large pile of salt at an Uppington, South Africa, salt mine. NaCl, KCl, and Na 2 SO 4; acid salts like NaHCO 3 and NaH 2 PO 4; or double salts like KAl(SO 4) 2. Table salt is sodium chloride, a chemical compound with the formula NaCl.