Atoms. Dan Kelly - Magic of Electrons - PLTW - Atoms What are atoms? Atoms are the smallest particles of matter Atoms make up everything around us Molecules.

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Presentation transcript:

Atoms

Dan Kelly - Magic of Electrons - PLTW - Atoms What are atoms? Atoms are the smallest particles of matter Atoms make up everything around us Molecules are combinations of atoms Elements are only one type of atom Compounds are made up of different types of atoms Hydrogen GasWater 2

What is the difference between atoms and elements? Atoms make up elements. To be an element, it can ONLY have ONE type of atom. The terms are often used interchangeably. For example, the Periodic Table of the Elements could also be written as the … Periodic Table of Different Types of Atoms. Dan Kelly - Magic of Electrons - PLTW - Atoms 3 Atoms vs. Elements

What is an atom? Atoms are the smallest particles of matter. What is an element? Elements are made up of only one type of atom. What is a molecule? Molecules are combinations of atoms. What is a compound? Compounds are made up of different types of atoms. What are some examples of these? 4 Dan Kelly - Magic of Electrons - PLTW - Atoms Let’s Recap

At the center of all atoms is the Nucleus. The nucleus contains protons and neutrons. Protons: (+) Positively charged atomic particles Neutrons: Uncharged (neutral) atomic particles What makes up an atom? Dan Kelly - Magic of Electrons - PLTW - Atoms 5 Components of an Atom

Orbiting around the nucleus are the electrons. Electrons: (-) Negatively charged atomic particles Nature prefers balance so if a particle is positively charged, it will attract negatively charged particles and vice-versa. What makes up an atom? Dan Kelly - Magic of Electrons - PLTW - Atoms 6 Components of an Atom

Where would you find the following parts of an atom and what is its charge? Protons: In the center of the atom Positive charge Neutrons: In the center of the atom Uncharged Electrons: Orbiting the atom Negative charge Recap Dan Kelly - Magic of Electrons - PLTW - Atoms 7 Components of an Atom

The atomic number is equal to the number of protons in the nucleus of an atom. The atomic number identifies the element. How many protons are in this nucleus? (assume the protons are red) Dan Kelly - Magic of Electrons - PLTW - Atoms 8 Atomic Number

Periodic Table of Elements Which element has 4 protons? NASA 9 Dan Kelly - Magic of Electrons - PLTW - Atoms

This course is titled “Magic of Electrons” and we will focus mainly on the electrons present in an atom. Why? It is important to understand how and why electrons move in order to understand how electricity works. In the coming presentations we will cover the importance of electrons and their importance. Dan Kelly - Magic of Electrons - PLTW - Atoms 10 Electrons