Chemical reactions can be identified when there is a change in color, energy is produced, change in odor, or if new substance forms.
(2) They tend to lose electrons easily when bonding is the correct answer.
All metals have either one, two, or three valence electrons. Therefore, they tend to lose these valence electrons in order to have eight valence electrons like noble gases do.
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Write the formula of the compound.
Write the numbers of each atom in the formula. Insert the relative atomic mass for each type of atom. Calculate the total mass for each element.
Add up the total mass for the compound.
1. Change in color
2. Formation of bubbles
3. Formation of a precipitate
4. Begins to make an odor