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All the elements have a tendency to form an octet.
To complete their octet
1. the incomplete octet of a central atom 2. odd electron molecule 3. compound with expanded octet 4. acc. to rule atoms complete their octet to complete their octet to become stable like inert gas, but it is seen that inert gases like xenon are not stabkle they combine with fluorine and oxygen to form no. of compounds. 5. shape of molecule cant be explained 6. stability of molecule cant be explained
The element whose atomic, and therefore proton number, of 6 is Carbon (C) and of 17 is Chlorine (Cl). Carbon has a valence of 4 electrons meaning it needs to 'take in' four more electrons to fill its octet (and thus follow the octet rule). The chlorine has a valence of 7 electrons and therefore it only needs 1 electron to fill its octet. Through a covalent bond, where the electrons are 'shared' between the molecules, 4 Cl and 1 C can bond to form the compound CCl4. All of the elements have a full octet and form a tetrahedrally shaped molecule.
compound
All the elements have a tendency to form an octet.
Elements which have d-orbitals (i. e. n=3 or higher) can form compounds with an expanded octet. Some examples are;Phosphorous Pentachloride PCl5Sulfur Hexafluoride SF6Dichloro Heptoxide Cl2O7
Group 0 Elements ( Helium, Neon, Argon...) do not form compounds because they have a complete Octet and are thus unreactive and exist as mono atomic elements
To complete their octet
1. the incomplete octet of a central atom 2. odd electron molecule 3. compound with expanded octet 4. acc. to rule atoms complete their octet to complete their octet to become stable like inert gas, but it is seen that inert gases like xenon are not stabkle they combine with fluorine and oxygen to form no. of compounds. 5. shape of molecule cant be explained 6. stability of molecule cant be explained
Elements combine to form chemical compounds.
the properties of a compound are not the same as the elements that form them.
a compound
\helium (He) and hydrogen (H)
After a chemical reaction two elements form a chemical compound.
The element whose atomic, and therefore proton number, of 6 is Carbon (C) and of 17 is Chlorine (Cl). Carbon has a valence of 4 electrons meaning it needs to 'take in' four more electrons to fill its octet (and thus follow the octet rule). The chlorine has a valence of 7 electrons and therefore it only needs 1 electron to fill its octet. Through a covalent bond, where the electrons are 'shared' between the molecules, 4 Cl and 1 C can bond to form the compound CCl4. All of the elements have a full octet and form a tetrahedrally shaped molecule.
Elements combine together by chemical bonding to form compounds.