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mina [271]
3 years ago
12

Which sample of matter has a crystal structure?

Chemistry
1 answer:
Maurinko [17]3 years ago
4 0
The correct answer:C) NaCl(s)
Hope this helps!
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Paul placed an ice cube into a beaker on a hot plate. The ice cube changed from a solid to a liquid and then to a gas. During th
faltersainse [42]
One thing that does not change is the chemical composition of water, which is still H2O. And maybe mass, if all of the particles remain inside the beaker, which was never mentioned in the question so I am not sure.
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3 years ago
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What term best describes the type of reaction that happens when a single element reacts with a molecule or compound, producing a
gogolik [260]

The answer is

C. A single replacement reaction (acid reactions)

An example would be the reaction between simple metal Potassium (K) and Water (H2O), resulting in a much solid compound called Potassium Hydroxide (KOH) and hydrogen gas is set free.

K+H2O --> KOH

5 0
3 years ago
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Elements within a period have ___.
Vlada [557]

Ans: Have the same number of electron shells

3 0
3 years ago
In the third period of the periodic table sodium is followed by magnesium aluminum silicon and phosphorus which of these element
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Answer:
            Phosphorous has the smallest atomic size.

Explanation:
                   As we know these elements belong to same period means there valence shell is the same. So moving from left to right along the period the shell number remains constant but the number of protons and electrons increases. So, due to increase in number of protons the nuclear charge increases hence attracts the valence electrons more effectively resulting in the decrease of atomic size.

Elements and their atomic radius are as follow,

<span><span>Magnesium          0.160 nm
</span><span>
Aluminium           0.130 nm
</span><span>
Silicon                  0.118 nm
</span><span>
Phosphorus         <span>0.110 nm</span></span></span>
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3 years ago
If an object absorbs all colors but blue, what color would it appear to be?
denis-greek [22]
The color would be blue
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3 years ago
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