•For atoms with 4 valence electrons, it can go either way. 18 electrons, means that there are 2 in the inner orbital, 8 in the middle orbital, and 8 valence electrons. •For atoms with LESS than 4valence electrons, they’re going to lose/give upelectrons to form positive cations. In the third shell, it holds a total of 2+6=8 electrons, so it has 8 valence electrons. Join Yahoo Answers and get 100 points today. The valence electrons are the electrons in the outermost electron shell of an atom.. That is why elements whose atoms have the same number of valence electrons are grouped together in the Periodic Table.. Generally, elements in Groups 1, 2, and 13 to 17 tend to react to form a closed shell, corresponding to the electron configuration #s^2p^6#.. So, it has 3 electron shells, and that will be its valence shell. Question: How Many Valence Electrons Are In Ar-* 1 Ar²+, 0 Х 5 ? Argon's atomic number is 18, which means it has a total of 18 electrons, 18 protons, and 22 electrons. •For atoms with 8 valence electrons, there is no change. The valence electrons (i.e., the $$2s^22p^4$$ part) are valence electrons, which do participate in the making and breaking of bonds. See the answer. The element manganese has seven valence electrons. Iron (Fe): [Ar]4s23d6 core electrons valence electrons [Ar]4s23d6 18 core electrons 8 valence electrons. Similarly, in calcium (Equation $$\ref{3}$$), the electrons in the argon-like closed shell are the core electrons and the the two electrons in the 4s orbital are valence electrons. It's mass, 40, minus 18 (electrons) equals 22 (neutrons). Get your answers by asking now. This problem has been solved! ground state definition. Rb3N because they are in the same family and have similar chemical behaviors. Still have questions? In the electron configuration [Ar]4s23d104p4, which are valence electrons? •For atoms with MORE than 4valence electrons, they’re going to gain/stealelectrons to form negative anions. With out the extra electrons, the P valence shell looks like this 3s2 3p3, now you can see why each phosphorus wants 3 more electrons, that will make it 3s2 3p6, just like Ar.3. a) all of the electrons after the [Ar] b) only the 4s2 electrons c) only the 3d10 electrons d) only the 4p4 electons e) both the 4s2 and the 4p4 electrons. Argon Ar[Ne]3s23p6core electrons: [Ne]valence electrons: 3S23P6electrons of an atom are divided into two ;that is core electrons and valence electrons.core electron are electrons that do not participate in boding.valence electrons are outer shell electrons that is associated with an atom and they participate in chemical bonding. The protons attract and hold the electrons, but the farther away the electrons are, the less the attractive force. Ask Question + 100. These elements include helium (He), neon (Ne), argon (Ar… Ca has 2 valence electrons (its a member of group 2); O has 6 (its a member of group 16), In has 3 (its a member of group 13), Ar has 8 (its a member of group 18) and Bi has 5 (its a member of group 15) 0 0. Show transcribed image text. The electronic configuration of manganese is [Ar] 3d5 4s2. Also, you know it is a noble gas, so it's valence is full. The valence electrons can be donated or accepted in an ionic bond or shared in a covalent bond. The atomic number of manganese is 25 and it has 25 electrons out of which seven electrons are in the last shell or orbit. Expert Answer 100% (2 ratings) Dear student, Atomic number of argon = 18 Number of electrons in Ar = 18e- Electronic configuration -1s22s22p63s23p6 Since charge on Ne view the full answer. Electrons are negatively charged, while the nucleus has a positive charge due to the protons. Chemists really only consider the electrons in the s and p orbitals in the energy level that is currently being filled as valence electrons. Use the periodic table to identify the number of core electrons and the number of valence electrons in each case below. e) both the 4s2 and 4p4 electrons. 8 Argon is a noble gas with an electron configuration of [Ne]3s^2\3p^6. Potassium (K): 1s22s22p63s23p64s1 core electrons ... 18 core electrons 1 valance electron.