Electron Configuration Gizmo

• Username: First Initial Last name --> TMcNeill

• Password: Pirates25

​Login Rules

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1. Elvis Perkins, a rather shy fellow, is getting on the bus shown at right. Which seat do you think he will probably sit in? Mark this seat with an “E.”

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2. Marta Warren gets on the bus after Elvis. She is tired after a long day at work. Where do you think she will sit? Mark this seat with an “M.”

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How many protons are in a lithium atom?

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A neutral atom has the same number of electrons and protons. 

How many electrons are in a neutral lithium atom?

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What do you see?

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Click Check. Is this electron configuration correct?

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What is the electron configuration of Hydrogen?

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What do you notice about the arrows?

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What is the electron configuration of helium

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Lithium

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Beryllium

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Boron

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What feedback is given?

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Is the electron configuration correct now?

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Show the correct electron configuration in the boxes at the right

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Write and illustrate the electron configuration for each element

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Based on this, what can you infer about the reactivity of helium and neon?

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Think and discuss: Select the PERIODIC TABLE tab, and look at the second row, or period, of the table. How does this row reflect the subshells of the second shell?

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1. Predict: Positively charged protons in the nucleus of an atom are attracted to negatively charged electrons. 

How do you think the atomic radii will change as electrons are added to a shell?

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Sodium electron configuration:

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Sodium atomic radii:

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Magnesium electron configuration:

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Magnesi atomic radii:

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Complete the table

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Analyze: How does the atomic radius change across a period of the periodic table?

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Interpret: Select the ATOMIC RADIUS tab. What do you notice?

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How do you think the size of atoms will change from top to bottom within a chemical family?

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Hydrogen radius

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Lithium radius

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Sodium radius

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Analyze: How does the atomic radius change as you go from the top to the bottom of a chemical family?

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Why does the atomic radius decrease as electrons are added to a shell? 

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Why does the atomic radius increase as you go from the top to the bottom of a chemical family?

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Think and discuss: Compare the electron configurations of hydrogen, lithium, and sodium. Why do you think these elements are grouped in the same family?

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What feedback is given?

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Is this configuration correct?

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What is the configuration?

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What is the electron configuration for calcium?

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What is the configuration for scandium?

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Observe: Scandium is the first element to contain electrons in the d subshell. How many orbitals does the d subshell have, and how many electrons can fit in the d subshell?

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Infer: Select the PERIODIC TABLE tab. The middle section of the table contains ten groups that make up the transition metals. Why do you think this section is ten columns wide?

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Based on what you see, in what order do you think subshells will be filled?

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Which subshell is filled after 4p?

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Which subshell is filled after 6s?

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Which subshell is filled after 5d?

Draw

Complete the table

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How many elements are in the lanthanides series?

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Which subshell is represented by the lanthanides series?

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Which subshell is represented by the actinides series?

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In general, how does the shape of the periodic table relate to electron configuration?