This depends greatly on the objects. I assume you know that the electrons that surround all atoms are what prevents any two objects from making contact. So hypothetically, if you could get two soccer balls to "touch," by the time they got within a femtometer of each other, you will have built up so much potential energy in the magnetic field between the two soccer balls that once you pushed it any further, all the energy would be released and the balls would go flying at a very high speed in opposite directions.
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The combination of the atoms releases heat energy.
they form a covalent bond
A molecule is 2 or more atoms clinging together in some fashion. The molecule can be simple, that is, the same substance as the atoms, or it can be compound, that is, the atoms are different, and are of a different substance as the atoms.
Depends on how you look at it. There are a total of 4 atoms (1N and 3O) but there are only 2 different atoms (Nitrogen and Oxygen).
Did you mean, "What could be different about 2 or more atoms of the same element?" If you did, the answer is that they can have a different number of neutrons.
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They repel each other.
It depends on if they are charged the same of different. Opposites attract, the same charge repels.
The combination of the atoms releases heat energy.
2 or more types of atoms can be in a compound
A molecule
they form a covalent bond
A molecule is 2 or more atoms clinging together in some fashion. The molecule can be simple, that is, the same substance as the atoms, or it can be compound, that is, the atoms are different, and are of a different substance as the atoms.
1 sulfur atom 2 oxygen atoms
Depends on how you look at it. There are a total of 4 atoms (1N and 3O) but there are only 2 different atoms (Nitrogen and Oxygen).
because there are 2 hydrogen atoms in the molecule of hydrogen atoms