Answer:
atomic number
Explanation:
isotope is a family of an element with the same atomic number but different mass number.
Answer:
Percent yield of alum is 38.6%
Explanation:
Find attached calculations for detailed explanation.
An exothermic reaction is one that releases energy from the system to its surroundings, usually in the form of heat, but also in the form of light, electricity, or sound. Since the water gives off heat, the temperature of the water should be lower, so the answer might be B) The thermometer will show a decrease in temp.
False, atoms can not be created that way
C. Planets can move at a varying speed due to forces exerted in space.