4. Round off the following results to three significant figures:
a) 23.01 g

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

The best solution for preventing harm to people and pets from severe hurricanes involves determining and warning residents about what

From the options provided for each element below, choose the properties that it may have based on its location in the periodic table fluorine (f): highly reactive nonmetal shiny a conductor