False. It's the other way around. Elements are pure substances, and pure substances are made up of only ONE kind of atom.
Answer:
The isotope Al-27 has 13 protons
Explanation:
Answer:
24+74+61+29+38+27+68+54= 375
then divide by the number of numbers in this case 8 so;
375/8= 46.875
<h2>that's the median
46.875</h2>
Explanation:
Answer:
the oldest rocks are in the center of the dome structure.
Explanation:
An example of a base in chemistry would be like soap or lye