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prohojiy [21]
2 years ago
7

Which element could scratch iron?

Chemistry
2 answers:
adelina 88 [10]2 years ago
8 0
Titanium. It is the hardest metal so would be able to scratch it easily
aleksandrvk [35]2 years ago
5 0
Titanium because it's really hard and it's going to scratch really easily
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The temperature in a town started out at 55 degrees. By the end of the day the temperature dropped to -6 degrees.
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Answer:

The choice of the answer is fourth option that is -61 degrees.

Therefore the temperature drop is -61°Centigrade.

Explanation:

Given:

The temperature in a town started out at 55 degrees

Start temperature = 55°Centigrade. (Initial temperature)

End of the Day      = -6°Centigrade. (Final temperature)

To Find:

How far did the temperature drop?

Solution:

We will have,

\textrm{Temperature drop}=\textrm{Final temperature}-\textrm{Initial temperature}

Substituting the above values in it we get

\textrm{Temperature drop}=-6-55\\\\\therefore \textrm{Temperature drop}=-61\° centigrade

Therefore the temperature drop is -61°Centigrade.

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A ____________ is the smallest unit of a compound that retains the unique properties of the compound
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Compounds are made up of elements that exist in a fixed proportion.  These elements are composed of atoms.  Now, the atom has subatomic particles (proton, neutron and electrons), however, these particles lack the ability to take part in chemical reactions by themselves; the smallest unit of a compound that can take part in a chemical reaction, therefore, is an ATOM. 

Thus, an AT<span>OM is the smallest unit of a compound that retains the unique properties of the compound</span>
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