how to describe 1,2,3 in chemistry on elements. For example O2,O3,O4
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Answer:
These are the no. of atoms of that element present in 1 molecule of it.
Answer:
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Some elements exist naturally as molecules. For example, hydrogen and oxygen exist as two-atom molecules. Other elements also exist naturally as diatomic molecules (see Table 3.3 “Elements That Exist as Diatomic Molecules”). As with any molecule, these elements are labelled with a molecular formula, a formal listing of what and how many atoms are in a molecule. (Sometimes only the word formula is used, and its meaning is inferred from the context.) For example, the molecular formula for elemental hydrogen is H2, with H being the symbol for hydrogen and the subscript 2 implying that there are two atoms of this element in the molecule. Other diatomic elements have similar formulas: O2, N2, and so forth. Other elements exist as molecules—for example, sulfur normally exists as an eight-atom molecule, S8, while phosphorus exists as a four-atom molecule, P4 (see Figure 3.3 “Molecular Art of S”). Otherwise, we will assume that elements exist as individual atoms, rather than molecules. It is assumed that there is only one atom in a formula if there is no numerical subscript on the right side of an element’s symbol.
Table 3.3 Elements That Exist as Diatomic Molecules
Hydrogen
Oxygen
Nitrogen
Fluorine
Chlorine
Bromine
Iodine
Figure 3.3 Molecular Art of S8 and P4 Molecules
Molecular Art
If each green ball represents a sulfur atom, then the diagram on the left represents an S8 molecule. The molecule on the right shows that one form of elemental phosphorus exists, as a four-atom molecule.
Figure 3.3 “Molecular Art of S” shows two examples of how we will be representing molecules in this text
Explanation:
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