How many protons is in this certain atom if it has a neutral charge and 16 electrons? and what atom is it?

a.
17; chlorine

b.
18; argon

c.
2; helium

d.
16; sulfur

This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.

Why doesn't heat added to water make the tempature rise above 100c

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?