Answer:
carbon, nitrogen,oxygen,flourine
Answer:
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
Explanation:
Answer:
b
Explanation:
The number of vibrations per second is known as the frequency
Answer:
The atomic number of an atom is the number of protons in the nucleus or the number of electrons in a neutral atom
Explanation:
Answer:
the answer is B.Construction
Explanation:
