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Courtnee Barchus

on 20 September 2013

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Transcript of Atoms

The Nucleus, Protons, and Neutrons
- The smaller structures that make up an atom are called subatomic particles.

- The nucleus of an atom contains protons and neutrons.

- The protons in the nucleus are positively charged.

- The neutrons are neutral or have a
charge of "zero".
- An atoms are the smallest basic unit of matter.

- An element is a type of atom.

- Different elements have different atoms. A hydrogen atom is different from an oxygen atom.

- What makes each atom different has to do with the number of subatomic particles (protons).
A Carbon Atom
Electrons and The Electron Cloud
- Electrons in an atom circle around the nucleus.

- The collection of electrons that form around the nucleus is called the electron cloud.

- Electrons are negatively charged.
Atom and Elements
- Carbon has six protons in its nucleus. Carbon is also number six on the periodic table. This number on the periodic table is called the atomic number.

- If you look at hydrogen on the periodic table it is number one. Hydrogen also has only one proton in its nucleus.

- An elements atomic number always equals the number of protons in that atom.
What makes up an atom?
The Structure Of An Atom
- protons
- neutrons
- electrons
- nucleus
- electron cloud
-Every atom has:
- What changes from atom to atom are the number of protons, neutrons, and electrons that they contain.

- An oxygen atom always has 8 protons and 8 electrons. A hydrogen atom always has 1 proton and 1 electron.
- There are also the same number of protons and electrons in an atom. If an atom has four protons, you automatically know that it has four electrons.
Brain Check
- Draw the atomic structure of the element oxygen. Include the correct number of protons, electrons, and neutrons. (include 8 neutrons)
with neutrons
and protons
electron in electron cloud
Chemical Bonds
*Main types of chemical bonds are ionic bonds, and covalent bonds.
-Ionic: formed when one or more electrons are transferred from one atom to another.
a. ion: an atom that is either positively or negatively charged due to loss or gain of electron during ionic bonding.
-Covalent: when electrons are shared between atoms.
a. example: water
Full transcript