Suppose you discovered a Group 2 element that has an atomic number larger than radium (Ra). What do you expect the melting and boiling points to be? Explain.

The sum of the oxidation numbers in a neutral compound is always

Convert a speed of 201 cm/s to units of inches per minute. also, show the unit analysis by dragging components into the unit‑factor slots.

Assume that 13.5 g solid aluminum (al) react with hcl to produce solid aluminum chloride (alcl3) salt and gaseous hydrogen (h2) at standard temperature and pressure.