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.

answer: option (4) is the correct answer.

explanation:

areas which are at low altitudes and near the equator tend to receive direct sunlight from the sun. hence, heat energy or radiations from the sun make these areas warmer and they have warmest water.

whereas areas which are at high altitudes and away from the equator do no receive direct sunlight. hence, no direct contact from the sun makes these regions colder and thus, they have colder water.

thus, we can conclude that the statement areas at low latitudes near the equator have the warmest water because they receive the most direct sunlight best explains the relationship between an area's geography and the temperature of its surface water.