18
Explanation:
The family number 18 consists of a pool of elements that are less likely to enter into chemical reactions. They are called noble gases or inert gases.
They do not react with other elements.
These elements are:
Helium
Neon
Argon
Krypton
Xenon
Radon
- inert gases do not react because their outermost shell is completely filled.
- most elements combines in order to fill their outermost shell completely
- for noble gases, this is completely done already
- all atoms on the periodic table tends to mimic them when they go into chemical reactions.
learn more:
Noble gas brainly.com/question/1781595
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Answer:
Red blood cells and the heart causes response to stimuli
Answer:
A
Explanation:
In the sequence of answer A, the letter in [CGGA] has been removed in the mutated sequence [-CGA].
