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Number of valence electrons.

Most of the time elements in the same group have the same number of valence electrons. Valence electrons are involved in bonding and this effects how elements react and determines their chemical properties.

Most of the time elements in the same group have the same number of valence electrons. Valence electrons are involved in bonding and this effects how elements react and determines their chemical properties.

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Answered on: 21 Sep 2019

5

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Answered on: 21 Sep 2019

Phosphorus

Phosphorus (P) has a first ionization energy of 1012 kJ/mol. See Table S for further information.

Phosphorus (P) has a first ionization energy of 1012 kJ/mol. See Table S for further information.

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9

4(Al) + 3(O2) = 2(Alv2)(Ov3). Coefficients are the numbers in front of the element symbols. Add 4 + 3 + 2 to get 9.

4(Al) + 3(O2) = 2(Alv2)(Ov3). Coefficients are the numbers in front of the element symbols. Add 4 + 3 + 2 to get 9.

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14, 15, and 16

Go to the Periodic Table and note the location of the stepped line dividing metals and nonmetals. Elements next to the left or right of this line are metalloids. Choice three includes 5 metalloids.

Go to the Periodic Table and note the location of the stepped line dividing metals and nonmetals. Elements next to the left or right of this line are metalloids. Choice three includes 5 metalloids.

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Answered on: 21 Sep 2019

138 g

Find the formula mass in grams. K =39 x 2 = 78 g; C =12 x 1 = 12 g; O =16 x 3 = 48 g. Total is 78 + 12 + 48 or 138 g.

Find the formula mass in grams. K =39 x 2 = 78 g; C =12 x 1 = 12 g; O =16 x 3 = 48 g. Total is 78 + 12 + 48 or 138 g.

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Answered on: 21 Sep 2019

138 g

Find the formula mass in grams. K =39 x 2 = 78 g; C =12 x 1 = 12 g; O =16 x 3 = 48 g. Total is 78 + 12 + 48 or 138 g.

Find the formula mass in grams. K =39 x 2 = 78 g; C =12 x 1 = 12 g; O =16 x 3 = 48 g. Total is 78 + 12 + 48 or 138 g.

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Asked on: 05 Dec 2017

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