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What is the total number of valence electrons in an atom with the electron configuration 1s2 2s2 2p6 3s2 3p3?
Wiki User
∙ 13y ago
It is element nitrogen. It has an atomic number of 7 and the valence electron is 5. It needs 3 electrons to complete its octet state. That's why sometimes it has the oxidation number of -3 in ammonia.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoValence electrons are the electrons in the outer most shell. The shell number is the number before p, s, d and f in the electron configuration. So in this particular element (which happens do be Fluorine) there are 2 electrons in the first shell and 7 electrons in the second shell. So the valence electrons are 7 (2s2 2px2 2py2 2pz1)
Wiki User
∙ 13y agoThe electron configuration of 1s2 2s2 2p6 3s2 3p3 describes the element phosphorus. To find the number of valence electrons of phosphorus, all you have to is add up the numbers in the superscripts that correspond with the largest number written before a letter. The largest number written before a letter in this case is 3, so we add up the superscripts of both of the "3" superscripts. That gives us 2 + 3 = 5 valence electrons.
Wiki User
∙ 14y agoThat element is nitrogen, which has 5 valence electrons.
Wiki User
∙ 10y ago6. The electrons that count as the valence shell are those in the outer shell, in this case principal quantum number 3 (3rd shell, Sulfur).
Wiki User
∙ 11y agoThe element with a valence electron configuration of 2s2 2p2 is carbon.
Wiki User
∙ 9y agoThere are three.
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What subatomic particles determine the charge of an atom?
The electron. The electron is has a negative charge. The more electrons that are in a valence shell of the atom the more negative the atom will be.
How many valence electrons in H2 atom?
H2 is not an atom, it is a diatomic molecule. Each hydrogen atom has 1 valence electron. When two hydrogen atoms covalently bond to form an H2 molecule, there are two valence electrons being shared by the two atoms.
How many valence electrons does HBr have?
Hydrogen has 1 valence electron. Bromine has 7 valence electrons. When hydrogen and bromine react, the bromine atom 'steals' the hydrogen atom's only electron. The hydrogen atom then has no electrons and the bromine atom has 8 valence electrons. The two atoms are now ions because their number of protons does not equal their number of electrons. The bromine atom is now a bromide anion and the hydrogen atom is now a hydrogen cation (a proton). The two ions remain together, ionicly bonded and together are called hydrogen bromide.
How do you determine the valence electrons using the orbital diagram?
Group 1 - 1 valence electron Group 2 - 2 valence electrons Group 13 - 3 valence electrons Group 14 - 4 valence electrons Group 15 - 5 valence electrons Group 16 - 6 valence electrons Group 17 - 7 valence electrons Group 18 - 8 valence electrons Groups 3 - 12 technically have 2 valence electrons, but will also use d sublevel electrons as valence electrons as well. So their number of valence electrons vary (even for the same element) and require some memorization.
What part of the atom is involved in a chemical bond?
A standard chemical reaction always and only involves a change in the electron configuration of the atom (either the number of electrons or their energy configuration).If the nucleus is affected (either the number of protons or electrons), then it is designated as a nuclear reaction, and this is quite different.
How do you find the number of valence elections?
To find the number of valence electrons for an atom, you need to look at its electron configuration. The valence electrons are the electrons in the outermost energy level of an atom. You can determine the number of valence electrons by looking at the electron configuration or the periodic table. For main group elements (Groups 1, 2, 13-18), the number of valence electrons is given by the group number. For example, group 1 elements have 1 valence electron, group 2 have 2 valence electrons, and so on.
What does the electron configuration of an atom reveal?
It can reveal the number of valence electrons in the last shell.
Why do all isotopes act the same way when they are different?
The electron configuration and the number of valence electrons are the same.
How many valence electron shells do titanium have?
Titanium has the valence electron configuration of [Ar] 3d2 4s2. This means that Ti has 2 valence electrons, lying in the 4th s orbital. Note the relationship between the d-orbital and valence electrons is more complicated, but they are not regularly considered valence electrons.
Is the periodic table is most easily understood in terms of the electron configurations of the elements?
Yes. In terms of electron configuration and the number of valence electrons.
How do you determine the number of valence electrons?
It depends on what group or family the element is in. For example, Potassium is in the first group of family so it only has 1 valence electron. However, since nitrogen is in the 15 group of family, it does not have 15 valence electrons. For double digit families, you just take the second digit, and that is the number of valence electrons. Therefore, Nitrogen would have 5 valence electrons.
Why do all isotopes of an element act the same way when they are different?
- the electron configuration is the same- the number of valence electrons is the same
How do the valence electrons configurations of the alkali metals compare with each other?
The valance electron configuration is the same in each at ns1 where n = the period number.
How can the number of core electrons be determine from the periodic table?
By finding the atomic number minus the group number
What do the electrons in an electron dot structure represent?
It represents the number of valence electrons in the atom.
What is the valence electron configuration for group 6a?
The elements in group 6a (16) have six valence electrons. The valence electron configuration is Xs2Xp4 , where X is the main energy level (period number).
How many valence electrons in arsenic?
Arsenic has a mass number of 33 with an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3. This means that there are 3 valence electrons.
