The term "product" refers to the result of one or more multiplications. For example, the mathematical statement would be read " times equals ," where.
Answer is "A".
Explanation;
Physical changes mean an arrangement of particles of a given substance without producing new substance but changes in physical form of the substance.
<em>Example :</em> vaporization of water ( water goes its gaseous phase from liquid form).
Chemical changes mean an arrangement of particles while forming new substance.
<em>Example : </em>heating of CaCO₃. (In this process CaO and CO₂ are formed).
In this problem, the volume of water has decreased. Hence, it can be said that this is an example of physical changes due to not forming of new substance.
Answer: Pb or lead.
Explanation: The number of electrons in an element is equal to the number of protons. Since the number of protons determines the element, go on the periodic table and look for a atomic number of 82.
Hope that helps!
