Un ion de un átomo con número de oxidación −1 con-
tiene 17 protones y 18 neutrones. Indica sus números
atómico y másico, así como la cantidad de electrones
que contiene.

Scientific evidence tells us that the cause of earths four season is the tilt of earth as it revolves around the sun. the student is instructed to illustrate this information in a science notebook. how will the student illiterate winter in the northern hemisphere?

Why is the melting of ice a physical change ?

The polymer used for the nonstick surface of cooking utensils is 24.0%c and 76%f by mass. what is the empirical formula of this polymer?