Answer: noble gases
Explanation: The elements whose valence shell is already filled is stable and thus don not lose or gain electron and thus do not react.
Halogen is the name given to fluorine family which have 5 valence electrons and thus easily gain electrons to attain stable configuration.
Alkaline earth metal is the name given to group 2 elements which have 2 valence electrons and thus easily lose 2 electrons to attain stable configuration.
Noble gases is the name given to group 18 elements which have 8 valence electrons and thus do not lose or gain electrons and thus is non reactive.
Alkali metals is the name given to group 1 elements which have 1 valence electrons and thus easily lose 1 electron to attain stable configuration.
<span>The layer of rock above it might contain the fossil of a fish as, according to the law of faunal successsion, this was the first animal to evolve after shelled organisms. In sedimentary rock, animals that evolved later could only be found in layers above those from an earlier time.</span>
It causes the water to evaporate from the earths surface so that it can cycle through again
The rounded three digits for the given number is 2.46
<u>Explanation:</u>
Significant figures are the number of digits in a value which contributes to the degree of accuracy of the value while measuring
<u>Rules:</u>
- Digits which are not zero are always essential.
- Any zeros between two major digits are important.
- Only a final zero or trailing zeros are important in the decimal section
<u>Solution:</u>
- Given number- 2.45986
- Decimals- 5 digits
- Scientific Notation
-2.45986 × 10^0
- Applying the rules until rounding the 3 digits we get,
- The rounded three digits for the given number is 2.46
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