Which of the following is a noble gas?
A) Ag B) S C) Na D)He

Based on its chemical properties, identify the position of each chemical family on the periodic table.

Which substance has non polar covalent bonds

Which statement is true regarding the diagram of circle p? the sum of y and z must be 2x. the sum of y and z must be x. the difference of z and y must be 2x. the difference of z and y must be x