Basics of Chemistry Worksheet-4
(a) element (b) proton (c) nucleus (d) electron
(a) electron (b) proton (c) neutrons (d) orbit
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Basics of Chemistry Worksheet-5
(a) electron (b) proton (c) neutron (d) core
(a) electrons and nucleus (b) electrons and neutrons
(c) neutrons and protons (d) electrons and protons
(a) A chemical change needs energy. A physical change needs heat.
(b) A chemical change is easy. A physical change is hard.
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