Answer:
C) Chemical changes involve formation of a new substance while physical change only impacts appearance or form.
Explanation:
The obvious difference between a chemical change and physical change is that in a chemical change new substances are produced while in a physical change, the form of the compounds are altered.
- Most phase changes are products of physical changes. Such changes are easily reversible.
- In a chemical change, a new kind of matter is formed. It is accompanied by energy changes.
- The process is not easily reversible.
1Hz = 1 cycle per second
19 cycles / .5 seconds = 38Hz
Ni oso sois ene e eisieknew. Jajaj
<span>Calcium. It is classified chemically as one of the alkaline earth elements. It is found in group two of the periodic table. It forms a white coating of calcium nitride (Ca3N2) in air. The symbol is classified as Ca. It is a metallic metal.</span>
Answer is: <span>lead changing to gold.
</span>Transmutation is the conversion of an atom of one element to an atom of another through nuclear reactions. N<span>umber of protons or neutrons in the nucleus is changed. </span>Particle accelerators and nuclear reactors used for creating elements.
