Answer:
1. C.
2. A.
3. D.
4. C.
5. B.
Explanation:
1. A compound is formed when two or more atoms are put together through a chemical bond. When atoms share electrons, the type of chemical bond is called a covalent bond.
2. Characteristics of a chemical reaction is the emission of light, production of heat, and change in color of the substance. However, it should be noted that a change in color does not always mean that a chemical reaction occurred, but generally, it is common.
3. The scenario given is a chemical reaction. In a chemical reaction, there are reactants and product. When the reactants "react", they produce a product. In this case, the product is Sodium chloride.
4. According to the law of conservation of mass, in a chemical reaction, the mass of the reactants should be equal to the mass of the product. This means that the amount of atoms of each element put into a chemical reaction, should produce the same amount of each element. This is what we call a balanced equation.
5. Given the reaction, we can tell that there are the same number of atoms of each element in the reactant side and on the product side. Let's break it down:
Reactant Product
Na + Cl → NaCl
Na = 1 Na = 1
Cl = 1 Cl = 1
Because they are equal in number, the equation is balanced.
