Answer:
When two or more atoms chemically bond together, they form a molecule. When molecules are made from two or more different kinds of atoms, the substances are called compounds. If molecules are made from only one kind of atom, the substances are elements.
Explanation:
<em> gave an explanation in my answer XD anyway hope I helped. Have a good day!</em>
Answer: 12.5 grams.
Explanation:
You can find the amount of pure substance remaining by using the half-life formula:
Where t is the amount of time, and t2 is the half life of the substance.
Substituting our values for the variables, we get this equation:
After 18 hours, there will be 12.5 grams of the substance remaining.
Chemist John Dalton described atoms as small spheres that could not be divided into anything smaller.
Answer:
well they form by heat and pressure
