Scandium 15. Write the nuclear symbol for an ion with a charge of +2,20 protons, and 24 neutrons.
_a. How many electrons are in this ion?
b. Is it an anion or cation?

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

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Which one of the following is an oxidation-reduction reaction? naoh + hno3 --> h2o + kno3 naoh + hno3 --> h2o + kno3 so3 + h2o --> h2so4 cacl2 + na2co3 --> caco3 + 2 nacl ch4 + 2 o2 --> co2 + 2 h2o al2(so4)3 + 6 koh --> 2 al(oh)3 + 3 k2so4