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Down: 1. An atom is made out of a sphere of positive charges with negatively charged electron embedded in it. Subatomic particle with a neutral charge 3. A tangible model. Matter is made of small indiviable atoms. 5. Most of the mass is concentrated in the center of atom. This tiny. dense, positively charged core called a nucius 6. Positively changed particlesAcross: Atomic model where electrons don't move around the nuclcus in orbits Electrons exist in specific energy levels asa coud. s. Electrons reside in orbits. They move berwcen cach shell when gaining or losing energy. 9. Ncgativdly charged particles 10. Building block of matter that cannot be broken apart using any chemical mcans Down: 1. An atom is made out of a sphere of positive charges with negatively charged electron embedded in it. Subatomic particle with a neutral charge 3. A tangible model. Matter is made of small indiviable atoms. 5. Most of the mass is concentrated in the center of atom. This tiny. dense, positively charged core called a nucius 6. Positively changed particles 7 Quarter 1​