1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
CaHeK987 [17]
2 years ago
15

Mendeleev created this table as he noticed that a

Chemistry
1 answer:
Nimfa-mama [501]2 years ago
4 0

Answer:

Mendeleev had left the noble gases out of his periodic table.

Explanation:

Mendeleev's periodic table is pictured in the image attached to the question.

Mendeleev's table obviously lacked the noble gases. The reason for this grave omission is simple; the noble gases were not known as at the time when he formulated his periodic table. There weren't any known elements  whose properties were similar to the  properties of the noble gases. This would have lead him to suspect their existence.

You might be interested in
Many esters have characteristic odors. Methyl salicylate exhibits a pleasant wintergreen odor. This ester can be prepared from s
hodyreva [135]

Answer:

Methanol would be used as a reagent in excess, since it is a very low-cost solvent. For product isolation, the first thing to do is remove the methanol through a distillation process. The residue produced can be dissolved in diethyl ether. Using a NaHCO₃ solution, extraction is performed. When it separates into two phases, the product will be in the ether and the reagent in the aqueous phase. The ether can also be removed by distillation, and at the end of this process you will have the product you want.

Explanation:

5 0
3 years ago
Different microscopic organisms cause different
lozanna [386]

Answer/Explanation:

A theory has lots of scientific evidence to back it up. We know this to be true based on lots of different diseases and studies of their spread.

A hypothesis is more of a starting point - an educated guess based on limited evidence. It requires further testing before becoming a theory.

A law is something that can be generalized to lots of contexts, and is universal. Such as the law of thermodynamics.

5 0
3 years ago
What must happen for an ionic bond to be created between two elements?
dezoksy [38]

Answer:

they must be heated

Explanation:

3 0
3 years ago
Solution A and solution B are separated by a semipermeable membrane. Solution A contains 1% glucose, solution B contains 5% gluc
Veseljchak [2.6K]

Answer:

Glucose will move from the solution B to the solution A

Explanation:

Given that:

Solution A contains 1% glucose, and,

Solution B contains 5% glucose

Diffusion is the net movement of the substance from the region of the higher concentration to the region of the lower concentration.

Thus, solution B contains more concentration of glucose as compared to solution A. <u>By the process of diffusion, the particle moves from higher concentration to lower concentration and thus, glucose will move from solution B to solution A.</u>

7 0
3 years ago
Type of introduction ​
AlladinOne [14]

Answer:

Five Types of Introductions.

“Inquisitive” Explain why your subject is important, curious, or interesting.

“Paradoxical” Explain what aspects of your subject seem improbable. ...

“Corrective” Explain how your subject has been misunderstood or misrepresented by others. ...

8 0
3 years ago
Other questions:
  • How many milliliters of 4.00 m hcl(aq) are required to react with 2.75 g of zn(s)?
    11·1 answer
  • What is best way to get salt out of salt water solution
    6·2 answers
  • When measuring the volume of a liquid in a graduating cylinder, you measure_____.
    8·2 answers
  • HELP!!! PLEASE!! I don't know this one question!!!
    9·1 answer
  • I have a question on my Chem homework. It's asking "How many molecules of N2O4 are in 76.3 g N2O4? The molar mass of N2O4 is 92.
    13·1 answer
  • What is point group of allene?​
    7·2 answers
  • Can someone please check my answer?
    8·2 answers
  • An enzyme acts to Group of answer choices raise the activation energy needed to start the reaction. lower the activation energy
    12·1 answer
  • When rocks slowly crumble due to rain, ice, and wind and<br> erode away, these processes form what?
    6·1 answer
  • The gure below shows partidos
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!