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mr Goodwill [35]
3 years ago
14

How did the work of Dmitri Mendeleev differ from that of John Newlands in the development of the periodic table?

Chemistry
1 answer:
alex41 [277]3 years ago
3 0
When Newlands tried to create a periodic table, his tried to conform to the "Rule of Octaves" he had discovered. He had the right idea, in that if you arrange the elements by atomic weight there would be similarities every 7 elements (not 8 because noble gases hadn't been discovered yet) but he tried to push this rule so much that he would put multiple elements in the same box to try to keep the rule. Mendeleev, however, left gaps in this table for undiscovered elements, which paved the way for our modern periodic table.
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grin007 [14]

Answer:

protons

Explanation:

i remember it as positive protons

neutral neutrons and

negetive electrons

7 0
3 years ago
Which is a positive effect of the technology advance of going from a compass to a gps
egoroff_w [7]

Answer:

Compass - Gps                              

Explanation:

I belive the pro's                                      and cons are

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the direction you                               to give you directions

are going on                                        and that it won't break or die

a device not a paper map

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You can see north east south and              it is usually carefully crafted for                                                                                                                                                                          o                                                                     outdoors but it has no roads and

west on the compass and                          if given no directions, extremely

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4 0
3 years ago
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goldenfox [79]
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5 0
3 years ago
How do you do this? very confused
Vlad [161]
The problem you have written you almost have it solved.  Take the moles that you have calculated and multiply that by the molecular weight to get the grams.

The STP problem:
use the moles you calculated along with 1 atm for Pressure, and 273 for the temperature and plug into the PV = nRT equation.  (also use 0.0821 for R)

From there you can solve for the volume

Hope this helps!
4 0
3 years ago
Which Statement correctly describes protons
____ [38]

Answer:

D.  

They have a positive charge and are present in the nucleus of an atom along with the neutrons.

explanation:

Protons have a positive charge.

7 0
2 years ago
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