Which of the following numbers will produce the same number when rounded to two significant figures? (2.3)

2.12
2.10
2.04
2.16

When the volume and number of particles of a gas are constant which of the following is also constant

It is important to wear proper protective equipment in lab even when not actively performing experiments because accidents can affect any researcher, even one not working on an experiment. select the best answer from the choices provided

Which other elements contain the same number of outer electrons as sodium