One atom of silicon can properly be combined in a compound with
a. three atoms of hydrogen.
b. four atoms of calcium.
c. two atoms of oxygen.
d. one atom of chlorine.

One atom of silicon is perfectly combined with the  and forms silicon dioxide.

Further explanation:

Law of multiple proportions:

This law states that the molecule is a particle that is made up of two or more element. The elements are always combined in a ratio of fixed whole number.

Silicon has electron configuration  so it can form 4 covalent bonds with other atoms.

One atom of silicon is combined with hydrogen in 1:4 ratio and form . This compound is known as silane. Thus silicon is not able to combine with three hydrogen atoms.

One atom of silicon is combined with calcium as calcium silicate   and Calcium silicon . Therefore, silicon would not be able to combine with 4 calcium simultaneously.

One atom of silicon is combined with oxygen in 1:2 ratio and form . This compound is known as silicon dioxide. Thus silicon can combine with two oxygen atoms.

One atom of silicon is combined with chlorine in 1:4 ratio and form . This compound is known as silicon tetrachloride. Thus silicon is not able to combine with one chlorine.

Learn more:

1. Calculate the moles of chlorine in 8 moles of carbon tetrachloride:

2. Which law states the direct relationship between volume and absolute temperature at constant pressure?

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Mole concept

Keywords: One atom of silicon, properly combined, three atom of calcium, one atom of chlorine and two atom of oxygen.