Which element in period 3 on the periodic table is a metalloid? magnesium (mg) aluminum (al) silicon (si) sulfur (s)

Chemical elements exhibit chemical as well as physical properties lie between metals and nonmetals is known as mettaloids.

Metalloids are present on the right hand side of the periodic table such as  boron, silicon, germanium, arsenic, antimony, and tellurium. The series of these six elements is said to be metalloids.

In the attached image, six elements are present in the right side and in grey color are metalloids.  Now, the metalloid which is present in period (from left to right) three on the periodic table is silicon.

Thus, silicon is the correct answer.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )