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PSA

QuestionAnswer
Mass Number protons + neutrons
how do you find how many neutrons are in an atom's nucleus? protons-electrons
periods rows on the periodic table
groups there are 18, vertical columns
families alkali metals, alkaline earth metals, transition metals, halogens, and noble gases
ions are electrically charged
non-metals and metals non-metals are on the right, metals are in the middle
most reactive elements halogens
radioactivity an unstable atomic nucleus emits charged particles and energy. Found in nature.
igneous form when molten material cool and solidifies inside or on the surface
Sedimentary forms over time as sediment is squeezed together and cemented.
metamorphic forms when rock transformed by heat and pressure or chemical reactions, most form under high temperatures and pressures deep underground
Created by: mmoreno760
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