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The Periodic Table. Define the following terms. 1. proton 2. neutron 3. electron 4. nucleus.

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Presentation on theme: "The Periodic Table. Define the following terms. 1. proton 2. neutron 3. electron 4. nucleus."— Presentation transcript:

1 The Periodic Table

2 Define the following terms. 1. proton 2. neutron 3. electron 4. nucleus

3  proton: ▪ a subatomic particle that is found in the nucleus of an atom ▪ it has a positive charge and a mass of 1 amu  neutron: ▪ a subatomic particle that is found in the nucleus of an atom ▪ it has no charge and a mass of 1 amu

4  electron: ▪ a subatomic particle that is found outside the nucleus in energy levels ▪ it’s constantly moving ▪ it has a negative charge and no mass  nucleus: ► the center of an atom ► contains protons and neutrons ► contains the mass of the atom ► very, very small and dense

5 Why is it appropriate to say that atoms are the “building blocks” of all matter?

6 Many periodic tables look different but still contain similar information.

7 1. atomic number - tells the # of protons (p + ) the atom has, by definition - also tells the # electrons (e - ), b/c atoms are neutral 2. chemical symbol - letter(s) that represent specific elements – only contain one capital letter 3. atomic mass - number of protons + the number of neutrons in one atom of the element (an average) - almost all mass is found in the nucleus of the atom


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