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Fudgin [204]
3 years ago
7

Practice Exercise #4

Biology
2 answers:
mr Goodwill [35]3 years ago
8 0
1 D 2. A. 3 D. 4 B. 5 D. 6. D
Amiraneli [1.4K]3 years ago
5 0

Answer ( A,c,B,B,B,B)

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I'm pretty sure its c or d
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When the outer electron shell is full in an element, this creates a __________ ___________
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When the outer electron shell is full in an element, this creates a Noble gas.

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Noble gases are the elements that belong to group 18 in the periodic table.  Noble gases are also called as inert gases. The outermost shell of the noble gases are fully filled by electrons. Due to this the noble gases don’t react with any other elements and remain isolated.

There are 6 noble gases in the periodic table. They are helium (He), Argon (Ar), Neon (Ne) Krypton (Kr), Radon (Rn) and Xenon (Xe). Noble gases conduct electricity. They are fluorescent, odorless and colorless. Noble gases are used a maintain stable elements in a constant and safe environment.

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c. CNS

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The Central Nervous System (CNS) is responsible for receiving and transmitting information throughout the body. We can define it with the command center that coordinates the activities of the body.  It consists of the brain and spinal cord, which are protected by the skull and spine respectively.

Both structures are reinforced by three connective blades, called meninges. They are: dura mater, arachnoid and pia mater. Between the last two there is a fluid that is responsible for the nutrition of the CNS and the minimization of possible trauma caused by mechanical shocks.

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