To Earth, since it has the same radio and masses. This is what I believe.
Metals are on the left side of the table and nonmetals are on the left with metalloids between them. And the noble gases are all in group 18 of the periodic table.
The correct answer is D.
Echo refers to the sound that is heard when a sound wave is reflected back from a surface. An echo sound is made when a sound wave traveled through the air, hit a hard surface and get reflected back. Generally, hard surfaces reflect sound wave while soft surfaces absorb sound waves. Reflected sound waves are used in application of some devices that are used in range and direction finding.
It is a Physical property because like water it changes into a ice cube but it can be melted into water or be turned back into an ice cube.
The answer is b) light waves travel faster than sound waves.
