Question

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Answer 1

Answer:

3 Helium and neon never form molecules because their shells are completely filled and they have very high ionization energies. The high ionization energies of helium and argon prevent these atoms from forming ions. Some of the other heavier noble gases, such as krypton and argon, will occasionally form molecules.

4 Both diamond and graphite are made entirely out of carbon, as is the more recently discovered buckminsterfullerene (a discrete soccer-ball-shaped molecule containing carbon 60 atoms). The way the carbon atoms are arranged in space, however, is different for the three materials, making them allotropes of carbon.

5 a ) When water is boiled, it undergoes a physical change, not a chemical change. The molecules of water don't break apart into hydrogen and oxygen. Instead, the bonds between molecules of water break, allowing them to change physically from a liquid to a gas. ... The gaseous form is water vapor.

b)When an electric current is passed through water, “Electrolysis of water” occurs, which is the decomposition of water (H2O) into hydrogen gas (H2) and oxygen (O2). ... Hydrogen gas forms at the cathode where the electrons enter the water and at the anode, oxygen is formed.

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Answer 2

Answer:

Graphite and diamond, both are allotropes of carbon, so, they have the same chemical properties. But, in graphite, each carbon atom shares electrons with 3 other carbon atoms, whereas in diamond, each carbon atom shares electrons with 4 other carbon atoms. ... Diamond is super strong, whereas graphite is brittle and soft.

Explanation:

Both diamond and graphite are made entirely out of carbon, as is the more recently discovered buckminsterfullerene (a discrete soccer-ball-shaped molecule containing carbon 60 atoms). The way the carbon atoms are arranged in space, however, is different for the three materials, making them allotropes of carbon