What is the pattern in the charge for elements in each group on the periodic table?

1 answer:

5 0

( besides the transition metals) the group shows charge with...
1, +1 charge ( loses to group 17)
2, +2 charge
13, +3 charge
14, ±4 charge ( depends on if this is a metal or nonmetal( metalloids are classified by which side of the staircase))
15, -3 charge
16, -2 charge
17, -1 charge ( gains from group one ( halogens(17) and alkali metals (1) are highly reactive).
18, no charge (noble gasses are always full with valence electrons, thus have no charge and rarely form compounds.)

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Answer:

There is 29.8 kilowatt hours needed.

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Step 1: Data given

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Step 2: Calculate moles of Magnesium

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Step 3: Calculate how many electrons are needed to produce the magnesium.

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The Faraday constant = 96500 couloumbs

1 mole of electrons is 96500 coulombs.

246.8 mol of electrons need 2.38 *10^7 Coulombs

Step 4: Calculate kilowatt-hours of electricity needed

2.38 * 10^7 C * 4.5 J/C = 10.7 * 10^7 J

10.7 * 10^7 J * ( 1 kW-h-/ 3.6*10^6 J ) = 29.8 kWh

There is 29.8 kilowatt hours needed.

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