- Why is 3rd shell 8 or 18?
- Why does sulfur have 12 valence electrons?
- Which elements can hold more than 8 valence electrons?
- Why does boron only need 6 valence electrons?
- Why can sulfur have more than 8 valence electrons?
- Can xenon have an expanded octet?
- Why do atoms want 8 electrons?
- Does oxygen give or take electrons?
- How many lone pairs does xenon have?
- How many valence electrons can Xenon have?
- Can an atom make 8 bonds?
- Why can Xenon break the octet rule?
- Can you have more than 8 valence electrons?
- Why does oxygen have 2 atoms?
- What is the valence of Xe?
Why is 3rd shell 8 or 18?
The third shell of an atom has 18 electrons only not 8 electrons.
You might be confused because first the electrons of 4s are filled and then the 10 electrons of 3d shells are filled.
They are filled because of the n-l rule.
So after filling the 3s and 3p subshell with 8 electrons, the next shell to fill is the 4s one..
Why does sulfur have 12 valence electrons?
Sulfur has one more electron pair in its 3s subshell so it can undergo excitation one more time and place the electron in another empty 3d orbital. Now sulfur has 6 unpaired electrons which means it can form 6 covalent bonds to give a total of 12 electrons around its valence shell.
Which elements can hold more than 8 valence electrons?
Sulfur, phosphorus, silicon, and chlorine are common examples of elements that form an expanded octet. Phosphorus pentachloride (PCl5) and sulfur hexafluoride (SF6) are examples of molecules that deviate from the octet rule by having more than 8 electrons around the central atom.
Why does boron only need 6 valence electrons?
Boron has a charge of 5. This is balanced by 5 electrons. … The valence electrons may participate in bonding through sharing with other atoms, to make three bonds. Three bonds = six electrons.
Why can sulfur have more than 8 valence electrons?
To accommodate more than eight electrons, sulfur must be using not only the ns and np valence orbitals but additional orbitals as well. Sulfur has an [Ne]3s23p43d0 electron configuration, so in principle it could accommodate more than eight valence electrons by using one or more d orbitals.
Can xenon have an expanded octet?
Xenon now has twelve electrons instead of the octet! This is called an “expanded octet”, expanding beyond the octet. … In the structure shown above, Xe has a formal charge of zero, so there is no reason to do any more to the structure.
Why do atoms want 8 electrons?
Row 3 elements on the left lose electrons to gain a full outer shell, elements on the right usually gain electrons to have 8 electrons in their outer shell. The basis of the octet rule is that atoms ‘want’ a full outer shell of electrons, i.e. they are most stable with a full outer shell.
Does oxygen give or take electrons?
Oxygen needs two electrons to fill its outermost electron shell. Hydrogen has one electron to play with. Therefore, an oxygen atom needs two hydrogens to bond to in order to complete its shell.
How many lone pairs does xenon have?
twomolecular shape The XeF4 (xenon tetrafluoride) molecule is hypervalent with six electron pairs around the central xenon (Xe) atom. These pairs adopt an octahedral arrangement. Four of the pairs are bonding pairs, and two are lone pairs.
How many valence electrons can Xenon have?
eight valence electronsXenon right over here. It is a noble gas. It has eight valence electrons.
Can an atom make 8 bonds?
The ability to use the d subshell is what makes it possible for atoms to go beyond the octet, and it’s also why atoms up to the second period cannot do that. For that same reason, six or seven bonds are possible, and Xenon can form 8 covalent bonds in the compound XeO4!
Why can Xenon break the octet rule?
Xe does not follow the octet rule. It actually bonds. It will hold more than 8 electrons. Xenon having valence electrons in the 4th energy level, will also have access to the 4d sublevel, thus allowing for more than 8 electrons.
Can you have more than 8 valence electrons?
Unlike atoms from periods one and two that only have the s and p orbitals (total of 8 valence electrons), atoms like phosphorus, sulfur, and chlorine can have more than 8 electrons because they are not restricted to the s and p orbitals and have a d orbital for additional electrons needed for bonding.
Why does oxygen have 2 atoms?
Two covalent bonds form between the two oxygen atoms because oxygen requires two shared electrons to fill its outermost shell. … It gets these four from four hydrogen atoms, each atom providing one. These elements all share the electrons equally, creating four nonpolar covalent bonds.
What is the valence of Xe?
eightXenon has eight valence electrons, which are the electrons in its outer shell.