5. 'Atoms of the same element or different elements combine to form a molecule'.
Give two examples each of - a) atoms of the same element b) atoms of different elements
combining to form a molecule.
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A) Ozone - O₃
Hydrogen - H2
B) Carbon dioxide - CO2
Hydrogen Chloride - HCl
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Answer:
A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound. All compounds are molecules, but not all molecules are compounds. When two hydrogen atoms combine with one oxygen atom, it becomes the compound water.
example Atoms of the same element
Hydrogen atom
Hydrogen molecule - 2 atoms of hydrogen
Oxygen ( O
2
)
2. Nitrogen (N
2
)
3. Hydrogen (H
2
)
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