Hot-air balloons float because the air caught inside the balloon is heated up by a burner, making it less dense than the air outside. As the burner heats the air, it expands and some of the air escapes; that's what makes it less dense
Answer:
In a covalent bond, the atoms bond by sharing electrons. Covalent bonds usually occur between nonmetals. For example, in water (H2O) each hydrogen (H) and oxygen (O) share a pair of electrons to make a molecule of two hydrogen atoms single bonded to a single oxygen atom.
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Question:
How many neutrons are there in 186W
Answer:
112
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# Cary on learning
Answer:
the nucleus is called the mass number and, expressed in amu, is approximately equal to the mass of the atom
Explanation:
Answer:
d
Explanation:
collagen is made of proteins
