"He". Observe the numbers found in each square. Note how the atomic number is always a whole number and the atomic mass number is not a whole number. We will learn much more about these numbers and the Periodic Table later in the course. Let's review what has been discussed so far. We first stated that chemistry is the study of matter and how various kinds of matter react with each other. Second, everything around us is composed of matter and the study of matter could be applied to all things. Finally, we learned that some matter cannot be broken down into simpler forms of matter and is designated as an element. = Know this Element's Symbol Fill in the blanks: I. Li 21. Manganese 2. Magnesium 22. Mg 3. C 23. Chlorine
"He". Observe the numbers found in each square. Note how the atomic number is always a whole number and the atomic mass number is not a whole number. We will learn much more about these numbers and the Periodic Table later in the course. Let's review what has been discussed so far. We first stated that chemistry is the study of matter and how various kinds of matter react with each other. Second, everything around us is composed of matter and the study of matter could be applied to all things. Finally, we learned that some matter cannot be broken down into simpler forms of matter and is designated as an element. = Know this Element's Symbol Fill in the blanks: I. Li 21. Manganese 2. Magnesium 22. Mg 3. C 23. Chlorine