26 because phosphorous has five valence electrons and flouride has seven times three.
Phosphorous (P) actually has a total of 15 electrons, but the 3 electrons referred to in the question are VALENCE electrons, i.e. outermost electrons.
Phosphorus has to gain a total of 3 electrons to achieve a noble gas configuration. You can find this for any non-metal because the last digit of its group number is the number of valence electrons it has. For example Phosphorus has 5 and Sulfur has 6. In order to achieve a noble gas electron configuration, you must have 8 valence electrons, so phosphorus must gain 3.
Calcium has a total of two valence electrons.
The beryllium atom has 4 electrons and the valence is 2.
Helium has 2 electrons (total of 2 electrons and 2 valence electrons)
There are 15 electrons total, with 5 valence (outer shell) electrons
well core electrons is the number of total electrons minus valence electrons so.......Phosphorus has 18 electrons and 5 valence electrons so 18 - 5 = 13 so there are 13 core electrons
Phosphorous (P) actually has a total of 15 electrons, but the 3 electrons referred to in the question are VALENCE electrons, i.e. outermost electrons.
This is a chemical element. You can find the how many electron in a single atom by using a Periodic Table.
Phosphorous has a total of 15 electrons, and of those, 3 of them are valence shell, or bonding electrons. So, 12 electrons are core electrons, and are non-bonding.
Phosphate (PO4-3) has five valence electrons from phosphorus and six per oxygen atom for a total of 29.
Phosphorus has to gain a total of 3 electrons to achieve a noble gas configuration. You can find this for any non-metal because the last digit of its group number is the number of valence electrons it has. For example Phosphorus has 5 and Sulfur has 6. In order to achieve a noble gas electron configuration, you must have 8 valence electrons, so phosphorus must gain 3.
Phosphorus atoms have five valence electrons. You can know this because P is in group 15/VA. The number of valence electrons is the same as the VA group number (5), or group number 15 minus 10, which is 5.
Calcium has a total of two valence electrons.
The beryllium atom has 4 electrons and the valence is 2.
Helium has 2 electrons (total of 2 electrons and 2 valence electrons)
Valence electrons are on the external shell.