Nucleus Write this down under the Nucleus flap. Nucleus is central part of atom. Composed of protons and neutrons. Nucleus contains most of an atom's mass.
Sooner or later every one of us breathes an atom that has been breathed before by anyone you can think of who has lived before us- Michelangelo or George Washington or Moses. Jacob Bronowski
Element Key Write this down inside the foldable. Take notes as directed. 6 C Carbon 12.0
The innermost shell closest to the nucleus can only contain how many electrons?
The innermost shell can only contain how many electrons? Models of an atom pictures electrons moving around the nucleus in a region called an electron cloud. The first energy shell contains TWO electrons. That’s it! For more information, click here: http://regentsprep.org/Regents/physics/phys05/catomodel/cloud.htm
How many electrons can the second energy level contain?
What is matter? The term matter describes all of the physical substances around us: your table, your body, a pencil, water, and so forth
Matter Anything that has mass and takes up space (has volume) Made up of different kinds of atoms
Matter Includes all things that can be seen, tasted, smelled, or touched Does not include heat, sound, or light
What is matter made of? Matter is made of atoms
Why use models? Models are often used for things that are too small or too large to be observed or that are too difficult to be understood easily
Models In the case of atoms, scientists use large models to explain something that is very small Models of the atom were used to explain data or facts that were gathered experimentally. So, these models are also theories