Question

solusyon sa kahirapan​

Answer 1

Answer:

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Non-chordates are animals without a notochord – the rod-like elastic structure that supports the body. ... Members of phylum Porifera, Coelenterata, Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata and Hemichordata fall under Non-chordates

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Answer 2

Answer:

Postulates of Werner's coordination theory:

(1) Metal shows primary valence (ionizable, oxidation number) and secondary valence (non ionizable, coordination number).

(2) Coordination number (secondary valence) is fixed for every metal.

(3) Negative ions satisfy primary valence and negative ions or neutral molecules satisfy secondary valence.

(4) Secondary valencies are directional in nature and determine stereochemistry of complex.