3/13 Chem Test
Terms
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- Cations
- positive part of compound
- Polyatomic ion
- An ion with multiple atoms.. ex: phosphate, acetate, hydroxide
- Anion
- negative part of compound
- Molecular formula
- only has non-metals in it
- Valence
- the out shell of electrons
- How do you know how many valence electrons?
- you can tell on the periodic table... it's either 8 or 0, up or down.
- When do you need to use parenthesis while writing chemical formulas?
- when there's more than 1 polyatomic atom
- Ionic formula
- has both metals & non metals in it
- Molecule
- a unit of something that floats around
- Formula unit
- a "latticework"; holds in ions.. like a crystal
- How do you know the charge on a transition metal?q
- stock system... number in parenthesis after their name