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natita [175]
3 years ago
9

The periodic table was developed based upon the work of which scientist?

Chemistry
2 answers:
ella [17]3 years ago
8 0
Mendeleev organized and constructed the periodic table of elements. And ordered the elements into increasing atomic number. 
sveticcg [70]3 years ago
5 0
C. Moosely
It is the Answer to your question.
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Which of the following elements has the greatest metallic character?<br> Rb<br> Mo<br> Au<br> B
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MrRissso [65]

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3 0
3 years ago
Fe(NO3)2 not sure how to get the oxidation numbers of all elements
Shtirlitz [24]
You must remember that oxidation number of hydrogen in acids is always +1, oxidation number of oxygen in oxides & acids is always -2... metals has always oxidation number on plus!

group NO3 comes from HNO3...and oxidation number of whole acid group is always on minus and equal to the amount of hydrogen atoms in this acid... so oxidation number of NO3 = -1

we have 2 NO3 groups so 2*(-1) = -2 and that is the reason why oxidation number of Fe in this formula must be +2... because sum of all elements always gives 0!

Now we could count of oxidation number for nitrogen... we write HNO3 and start counting from right to left:
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4 0
3 years ago
PLEASE HELP &lt;3
frutty [35]
In order for carbon to be stable and have 8 electrons, it must make 4 total covalent bonds.

In prefer for oxygen to be stable and have 8 electrons, it must make 2 covalent bonds.

So, we can deduce that CO2 looks like this:

O=C=O

This molecule has two double bonds.

Pssst...Can I get a brainliest?
8 0
3 years ago
Which product(s) would be obtained by the dehydration of 2-heptanol? of 2-methyl-l-cyclohexanol?
Komok [63]
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1)CH3-CH(OH)-СН2-СН2-СН2-СН2-СН3---(H2SO4)--›CH3-CH=CH-CH2-CH2-CH2-CH3+H2O
2)2-methyl-l-cyclohexanol---(h2so4)--›CH2=C(CH3)-CH2-CH2-CH2-CH2-CH3+H2O
5 0
3 years ago
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