Answer:
The student's speed is 60 mph.
Explanation:
All you have to do is divide: 260/4 = 60 mph.
As temperature increases, the average kinetic energy of a sample of gas molecules decreases.
Calcium. this is because Mg and calcium is in the same group. hence, they have similar chemical properties
C: Its not A because it is not a noble gas as it doesn't have a full valence shell, its missing 1 electron. Its not B because iodine is not a metal and its not D because it is not a metalloid. But it is C because it does form anions and is a non metal
