How is the number 8.697 x 10-5 expressed in regular numerals? C. 0.08697
Answer : The diatomic molecule of chlorine, Cl₂, is held together by a SINGLE covalent bond.
Covalent Bond :
It is type of chemical bond, which is formed by sharing of electron between atoms . The covalent bond is formed between two non metals . The valance electron are shared to form the bond . The shared electrons are known as BONDING electron pair and the electron pair which do not take part in bonding are known as NON- BONDING electron pair. Example : O₂ , H₂ , H₂O, NH₃ etc .
Formation of covalent bond in Cl₂ :
Chlorine is present in group 17 in p block , It is a non metal .
The electronic configuration of Cl is : 1s² 2s² 2p⁶ 3s² 3p⁵ .
Since the outer shell is n= 3 , which has 7 electrons in it , hence Cl has 7 valence electrons in it .
From electronic configuration , it can be seen that Cl need 1 electron to complete its octet (3s² 3p⁶ ). Hence when two Cl atoms come close they share one-one electron with each other (as shown in image ) .
Now the octet of both the atom are complete and they are in stable state together .
When both Cl atom share one e⁻ , there is a bond formed between Cl atoms . One bond consists of 2⁻ . Hence in Cl₂ SINGLE covalent bond present .
Cl + Cl -> Cl₂
Salutations!
A kind of sedimentary rock formed from plant material over a long period of time is __________.
<span>A kind of sedimentary rock formed from plant material over a long period of time is coal. Coal is a fossil fuel as well.
Hope I helped (:
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The following double-displacement reactions are fully applied/answered:
A. HC2H3O2(aq) + NaHCO3(aq) → NaC2H3O2(aq) + H2CO3(aq)
B. NaOH(aq) + HCI(aq) → NaCI(aq) + HOH(I)
<em>(The answers are</em> A. & B.<em>)</em>
Answer:
12 - x = 20 - 5x
Add 5x on both sides,
12 - x + 5x = 20 - 5x
12 + 4x = 20
Subtract 12 on both sides,
12 - 12 + 4x = 20 - 12
4x = 8
Divide 4 on both sides,
4x / 4 = 8 / 4
x = 2
Hence proved.