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The atomic number is not what dictates how many bonds it will form with hydrogen. Iodine is in group 7A (XVII) and so it has 7 valence electrons. It wants 1 more, and so it will share the 1 electron that hydrogen has. It thus will make ONE bond with hydrogen, to form hydrogen iodide, HI.
one bond; H-I.
Like all other halogens, usually one. Like all elements in or below the third row of the periodic table, it is able to make additional bonds in some cases, though those are rare. One example is the triiodide ion, where one iodine makes two bonds.
One covalent bond is between iodine and hydrogen.
Silicon has 4 bonds with hydrogen
Silicon has 4 bonds with hydrogen
Hydrogen selenide (H2Se) has two bonds.
Silicon has 4 bonds with hydrogen
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Hydrogen has one electron and is therefore capable of forming only one bond.