Answer:
Halogens always form anions, alkali metals and alkaline earth metals always form cations. Most other metals form cations (e.g. iron, silver, nickel), whilst most other nonmetals typically form anions (e.g. oxygen, carbon, sulfur).
Explanation:
Examples: Sodium (Na+), Iron (Fe2+), Ammonium (NH4
It is Scandium or Sc
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Answer:
b. a new gas is observed in the form of bubbles
Explanation:
The only statement that was evidence of a chemical reaction is a new gas is observed in the form of bubbles Any time a new substance is created, a chemical reaction has taken place.
It would be warmer according to the orbital axial tilt. Nevertheless, the greenhouse effect is melting much of the ice in Greenland and Antarctica. Should we continue our human activity of destruction, such as producing overwhelming amounts of carbon dioxide by burning fuels and cutting down jingles to construct buildings, say Goodbye soon.