Is there any other number in the periodic table thats the same as silicon?

Two identical 82 mg dust particles very far apart (pee 0) are moving directly toward each other at a speed of 3698 m/s. the charge on each is-719 ? c. determine how close they will get to each other. let k = 9x109 n-m2/c2 & ignore gravity.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Which type of basaltic lava flow has a fairly smooth