In the calculation of valence electron counts using the 18-electron rule, phosphine (PH3) contributes 5 valence electrons. Since each hydrogen atom contributes 1 electron, the total valence electron count for PPh3 (Ph = phenyl group) would be 5 (from phosphorus) + 3x1 (from hydrogen) = 8 electrons.
Elements with the same number of valence electrons are located in the same group on the periodic table. For example, elements in Group 1 (e.g., hydrogen, lithium, sodium) all have 1 valence electron, while elements in Group 17 (e.g., fluorine, chlorine, iodine) all have 7 valence electrons.
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The valence electrons of calcium will tend to give away electrons, as it is an alkaline earth metal with two valence electrons. This makes it more energetically favorable for calcium to lose these two electrons and achieve a full outer electron shell by forming a 2+ cation.
Two electrons will fill a hydrogen's outer, or valence, shell.
Silicone has 4 valence electros so it would need 4 hydrogen atoms to give itself an octet of valence electrons.
In the calculation of valence electron counts using the 18-electron rule, phosphine (PH3) contributes 5 valence electrons. Since each hydrogen atom contributes 1 electron, the total valence electron count for PPh3 (Ph = phenyl group) would be 5 (from phosphorus) + 3x1 (from hydrogen) = 8 electrons.
Elements with the same number of valence electrons are located in the same group on the periodic table. For example, elements in Group 1 (e.g., hydrogen, lithium, sodium) all have 1 valence electron, while elements in Group 17 (e.g., fluorine, chlorine, iodine) all have 7 valence electrons.
you have to give it 6 valence electrons
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The force of attraction between the atom's nucleus and its valence electrons are the least. Hence valence electrons are lost easily.
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
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Two types: Covalent, in which they share valence electrons to form molecules. Ionic, in which they give or lose valence electrons two each other.
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
The number of valence electrons