Answer:
FALSE.
Explanation:
The right answer is false. There are three different groups of phylum for worms.
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Answer:
valency of an element is a combining power of an element.
for example oxygen has six valance electron but its valency is 2.
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Carbon (24.00)(2)+hydrogen(1.01)(6)
Answer:
ion mobility spectrometer
Explanation:
it is an handheld chemical dectection device
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Answer:
b) N3-
Explanation:
The octet rule stipulates that a chemical specie is stable if it has eight electrons in its outermost shell.
Nitrogen belongs to group 15. This means that it has five electrons in its outermost shell. The formation N3- means that it accepted three electrons.
This brings the total number of outermost electrons to eight in accordance with the octet rule.
