Hi! This is my Digital Scientific Notebook for chemistry class with Mrs. Parsons. Here you will find a digital version of all my chemistry notes and other homework!
Groups of the Periodic Table - 9/3:
Introduction to the Atom - 9/5:
Groups of the Periodic Table - 9/3:
- A group of the periodic table is really just a column.
- All elements in the same group have the same number of electrons in the outer shell.
- Hydrogen is not really considered an Alkali metal because it is, 1, not usually in metal form and, 2, it does not usually give away electrons.
- Elements always want to have 8 elements in their outer layer.
- Metals like to share electrons. That's why they are so conductive with electricity.
- Elements that tend to share electrons more tend to have their electrons farther from the nucleus so they are easier to separate.
- The noble gases (except for helium), all have 8 electrons in their outer layer. Because of this, they are very unreactive.
Introduction to the Atom - 9/5:
- Different substances tend to have different properties such as reactions or state.
- The atom is the most basic unit of all elements.
- Most of all living things is made out of Carbon.
- Khan's hair is black.
- You can string approximately one million carbon atoms across the width of a common human hair.
- The # of protons in the nucleus of an atom defines the element.
- The # of protons is the atomic number.
- Unlike forces attract each other (protons and electrons). That is called the electromagnetic force.
- If an atom has more protons than electrons, it has a net positive charge and vise versa.
- the word atom is Greek for uncuttable.
- Atoms are made of protons, neutrons, and electrons.
- You cannot know or guess an electrons momentum or location at any given time. All you can know is where it is likely to be. its probability.
- The function of where an electron is is called an orbital.
- The farther away an electron is from the nucleus, the more potential energy it will have.
- Changing the number of neutrons or electrons does not change the atom.
- The atomic mass subtracted by the atomic # (or # of protons) is the amount of neutrons in the atom's nucleus.
- The mass of one proton is equal to the mass of 1,836 electrons.
- An isotope is the same element with a different number of neutrons.
- 99.99% of an atom is open space that is why atoms don't collide with each other.