Environmental Science 15th Edition by Scott Spoolman,Tyler Miller

تمرين 1

What are the two key concepts for this section? What is matter ? Distinguish between an element and a compound and give an example of each. What is the periodic table of elements ? Define atoms , molecules , and ions and give an example of each. What is the atomic theory ? Distinguish among protons , neutrons , and electrons. What is the nucleus of an atom? Distinguish between the atomic number and the mass number of an element. What is an isotope ? What is acidity ? What is pH ? Define chemical formula and give an example.