If you are talking about chemistry, it's coefficient!
Answer:
the symbol of an iron is Fe (ferous, feric).
Answer:
1380 kilogram/cubic meter




Yes, and no. We all should know by know we do need the sun to survive, but we also need for energy is oxygen and the food we eat.
Answer:
For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.
Explanation:
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