Which of these particles are equal in number when an atom is neutral?
A. protons, neutrons
B....
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If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?
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Which missing item would complete this alpha decay reaction ? > 228/88ra + 4/2he a.224/96 rn b. 232/90 th c. 230/92 u d. 235/92 u
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