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History
Electronic structure
A period 2 element is one of the chemical elements in the second row (or "period") of the periodic table of the chemical elements. This second period contains more elements than period 1, with eight: lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon. In a quantum mechanical description of atomic structure, this period corresponds to the filling of the 2s and 2p orbitals. Period 2 elements obey the octet rule in that they need eight electrons to complete their valence shell. The maximum number of electrons that these elements can accommodate is ten, two in the 1s orbital, two in the 2s orbital and six in the 2p orbital. Read full entryThis entry is from Wikipedia,the leading user-contributed encyclopedia.It may not have been reviewed by professional editors(See full disclaimer)
- 1.Period 2 element - Wikipedia, the free encyclopedia
- 2 Electronic structure. 3 Period trends. 4 Diatomic molecules. 5 Elements. 5.1 Lithium ... Period 2 elements obey the octet rule in that they need eight electrons to ...
- http://en.wikipedia.org/wiki/P
eriod_2_element
- 2.Trends Across Period 2 of the Periodic Table
- Trends Across Period 2 of the Periodic table suitable for high school ... For this reason, all the elements in Period 2 have the first electron 'shell' ...
- http://www.ausetute.com.au/tre
ndpd2.html
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wHAT PERIOD 2 ELEMENT HAS A wHAT PERIOD 2 ELEMENT HAS A
CHEMICAL PROPERTIES MOST LIKE
SILICON? How many
valence-shell electrons does
this element have?How many
valence-shell electrons does
silicon have?
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Germanium is wrong, its in the 4th period. Carbon is the right answer because its in the 2nd period. The "period" an element is in is basically the horizontal row it is in. The vertical columns in the periodical table are called "groups" |
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What is the outer electron Please tell me!
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The element in Group 2, Period 6 is Ba (Barium) Barium's outer electron configuration is 6S^2 |
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describe and explain the trend LiCl, BeCl2, BCl3,CCl4,NCl,
Cl. these are the period 2
elements.
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LiCl is ionic. BeCl2 is also ionic and has a linear structure (Cl-Be-Cl). BCl3 is trigonal planar in structure. Boron has 3 electron in the outer orbitals to share with the Chlorine atoms. These bonds are very polar. CCl4 is polar covalently bonded tetrahedral shape. The 4 available carbon electrons form sp3 hybrid orbitals. NCl3 is a very unstable compound which does not use all of the electrons in the outer orbitals of the Nitrogen. The shape of the molecule is a trigonal pyramid. Cl2 is a pure covalent bond dimer. Each Chlorine atom only shares one electron with the other atom. |
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