The similarities of physical and chemical changes is that both of those changes change the way the object looks by it's physical appearance. Also they use a type of element to change that object.
Explanation:
the physical and chemical properties of an element are periodic functions of their atomic number.
Answer:
B) Cations lose electrons having a charge of positive.
Explanation:
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In this case, it is widely known that ions are classified as positive cations and negative anions, since the former is produced when a metal loses electrons and the latter when a nonmetal gains electrons; in such a way, the correct choice is:
B) Cations lose electrons having a charge of positive.
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The chemical name is ferric oxide or iron (III) oxide or hematite. We can found it naturaly as a magnetite, mineral.
Valence electrons determine its valency ? (The group, as in its oxidation state and stability)