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Paul [167]
2 years ago
13

Aquafers are bodies of water found above ground with thriving ecosystems. O True O False

Chemistry
1 answer:
BaLLatris [955]2 years ago
8 0

Answer:

true

Explanation:

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How many grams is needed to make the following solution?
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Answer:

c

Explanation:

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What is the total number of valence electrons un xenon(xe)
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8

Explanation:

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How many electrons in an atom with the atomic number of 45
Sergio039 [100]

Answer:

Number of Protons: 45

Number of Neutrons: 58

Number of Electrons: 45

Explanation:

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Using the periodic tables, identify the heaviest member of each of the following groups:
Lady_Fox [76]

Answer:

(a) Alkali metals: Francium (Fr)

(b) Chalcogens: Polonium (Po)

(c) Noble gases: Radon (Rn)

(d) Alkaline earth metals: Radium (Ra)

Explanation:

In the periodic table, the atomic mass increases down the group. Therefore, the last element of a group is the heaviest element of the group.

(a) alkali metals: The chemical elements that are present in group 1 of the periodic table, except hydrogen.

<u>The heaviest member of this group is francium (Fr)</u>

(b) chalcogens: The chemical elements that are present in group 16 of the periodic table

<u>The heaviest member of this group is polonium (Po)</u>

(c) noble gases:  The chemical elements that are present in group 18 of the periodic table

<u>The heaviest member of this group is radon (Rn)</u>

(d) alkaline earth metals: The chemical elements that are present in group 2 of the periodic table.

<u>The heaviest member of this group is radium (Ra)</u>

7 0
3 years ago
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