Periodic Table Study Guide Determining Shells and Valence Electrons

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Periodic Table Study Guide Determining Shells and Valence Electrons

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Periodic Table Determining Shells and Valence Electrons

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Periodic Table Study Guide Determining Shells and Valence Electrons

Periods Each row is called a “period” The elements in each period have the same number of shells 1st Period = 1 Shell 2nd Period = 2 Shells 3rd Period = 3 Shells 4th Period = 4 Shells www.chem4kids.com

Groups Group 8 = 8 valence e- Group 1 = 1 valence e- Except for He, it has 2 electrons Group 2 = 2 valence e- Each column is called a “group” 3, 4, 5, 6, 7 Each element in a group has the same number of electrons in their outer orbital, also known as “shells”. The electrons in the outer shell are called “valence electrons” www.chem4kids.com

Transition Metals Transition Metals have slightly different rules for shells and valence electrons. This is something you will learn about in High School Chemistry. www.chem4kids.com

Determine the number of shells and the number of valence electrons for: Carbon - C 2nd Period = 2 shells 4th Group = 4 valence electrons www.chem4kids.com

Determine the number of shells and the number of valence electrons for: Sodium - Na 3rd Period = 3 shells 1st Group = 1 valence electron www.chem4kids.com

Write your answers in your notebook. Ne Name the element: Atomic number: Number of p+ and n in nucleus: Number of e- in electron cloud: Number of e- energy shells: Valence electrons:

Check your answers in your notebook. Ne Name the element. Number of shells ? Valence electrons ? Neon 2nd Period = 2 shells 8th Group = 8 valence electrons

Write your answers in your notebook. H Name the element. Number of shells ? Valence electrons ?

Check your answers in your notebook. Name the element. Number of shells ? Valence electrons ? Hydrogen 1st Period = 1 shell 1st Group = 1 valence electron

Write your answers in your notebook. Be Name the element. Number of shells ? Valence electrons ?

Check your answers in your notebook. Be Name the element. Number of shells ? Valence electrons ? Beryllium 2nd Period = 2 shells 2nd Group = 2 valence electrons

Write your answers in your notebook. Name the element. Number of shells ? Valence electrons ?

Check your answers in your notebook. Name the element. Number of shells ? Valence electrons ? Sulfur 3rd Period = 3 shells 6th Group = 6 valence electrons

Write your answers on your handout. K Name the element. Number of shells ? Valence electrons ?

Check your answers in your notebook. Name the element. Number of shells ? Valence electrons ? Potassium 4th Period = 4 shells 1st Group = 1 valence electron

Write your answers in your notebook. He Name the element: Atomic number: Number of p+ and n in nucleus: Number of e- in electron cloud: Number of e- energy shells: Valence electrons:

Check your answers in your notebook. Name the element. Number of shells ? Valence electrons ? Helium 1st Period = 1 shell 8th Group = 2 valence electrons Helium is the exception in Group 8. Since it has just one shell, that shell can only fit 2 electrons instead of 8. It is in this group because all the elements have a full outer shell.