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...Signature lab th grade science close encounters of the periodic kind teacher pgs unit minutes objective student will be able to discuss and explain what a family period are on table elements correctly arrange aliens in proper families periods based up identify number electrons three energy levels each alien define valence electron interpret any square teks describe structure atoms including masses electrical charges locations protons neutrons nucleus cloud b that determine an element s identity its chemical properties reactivity c arrangement groups how used classify guiding questions is planetary exchange yearbook page similar looks like has students have same arms as noble gases located far right fingers represent id atomic would you find by looking at equal or this model limitations answers vary did recognize belonged they had clothing antenna was amount atom can using found last arm materials glue scissors construction paper pictures editor letter notes take roll staff sharpcity mi...