Elements in group 2: Gain 2 electron & form a -2 charge ion
Gain 2 electron and form a +2 charge ion
Loss 2 electron and form a -2 ion
Loss 2 electrons and form a +2 ion.

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

What are the primary responsibilities of a chemical engineer involved in "r& d"? develop large scale manufacturing operations discover new products and processes training of new chemists determine products needed by consumers