Answer:
Attached image of the Lewis structure.
Explanation:
To draw the Lewis structure of SiH₄, we need to consider the octet rule: atoms gain, lose or share electrons to have 8 electrons in their valence shell. H is an exception to this rule because it is completed with 2 electrons (duet).
Si is a semimetal and H a nonmetal, and they form covalent bonds, that is, they share pairs of electrons to be complete.
Si has 4 valence electrons, so it forms 4 covalent bonds to reach the octet.
Each H has 1 valence electron, so each H forms 1 covalent bond to reach the duet.
The resulting structure can be seen in the attached picture.
