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
max2010maxim [7]
3 years ago
13

Why didn't mendeleev use atomic number to arrange the elements?

Chemistry
1 answer:
Pepsi [2]3 years ago
8 0

The primary reason for this was that Mendeleev didn't know that atomic numbers actually existed. Atomic numbers were only discovered a period after Mendeleev's time. The use of X-rays made it possible to find the atomic number, and those had not been discovered yet. <span>
<span>The periodic table was then arranged in 1913 by Henry Moseley in an arrangement according to atomic number.</span></span>

You might be interested in
How would these cells appear under a microscope at a higher magnification.
gulaghasi [49]

they would be more detailed? what type of cells though?


5 0
3 years ago
During chemical reactions the bonds between atoms break and new bonds form. Energy must be absorbed to break a bond, so breaking
ss7ja [257]

Answer:

The equation is: CuCO3(s) → CuO(s) + CO2(g)

Explanation:

Copper carbonate decomposes at high temperatures, generating the products carbon dioxide (CO2) and copper oxide (II) CuO. In this type of decomposition reaction, a substance is broken generating two different compounds.

7 0
3 years ago
Why is it important for scientists to review and repeat the work of other scientists
guapka [62]

Answer:

Accuracy

Explanation:

It is important for scientists to review the work of other scientists, so they can be sure there are no mistakes or lack of judgement. They repeat to compare results to make hypotheses.

3 0
2 years ago
Ionic compounds involve a (share, tranfer) of electrons and typically involve atoms that have (Large, similar, very different) e
Juliette [100K]

Answer:

2 Transfer; very different

Explanation:

Ionic compound are compound that are formed from transfer of electron. The cations donate the electron(s) while the anion receive the electron(s). The compound possess a positively charged end and a negatively charge end. Example of ionic compound is NaCl . The sodium donates one electron to the chlorine  to fulfill the octet rule. The sodium atom becomes positively charged  as it donate electron to the chlorine atom. The chlorine atom becomes negatively charged as it receive electron from Sodium atom.

The atoms that are involve in forming ionic compound have very different electronegativity . Electronegativity  is the measure of the ability of an atom to attract a bond pair of electron. For example the NaCl compound, the two atom has verse differences in the electronegativity. Cl atom is far more electronegative than Sodium atom.

6 0
2 years ago
What states of matter does water naturally exist on Earth
amid [387]
Solid (ice caps)
Liquid (oceans, rivers, lakes, etc)
Gas (clouds)
5 0
2 years ago
Read 2 more answers
Other questions:
  • Why is vigorous trituration required to prepare emulsions?
    8·1 answer
  • A hiker seals a plastic bag that contains dried fruits before he climbs a mountain. What will most likely happen to the plastic
    10·2 answers
  • Answer the question
    13·1 answer
  • Which word is the opposite of boiling
    13·2 answers
  • Consider these elements: N, Mg, O, F, Al. a. Write the electron configuration for each element. b. Arrange the elements in order
    12·1 answer
  • What is the energy of a photon emitted with a wavelength of 448 nm?
    14·1 answer
  • Help please!!!! I need to know the answer to this problem it would mean a lot if u helped :))
    6·1 answer
  • Can you answer all of the questions plz
    5·2 answers
  • Block A is made of copper, which has a specific heat value of 0.385 J/g*C.
    13·1 answer
  • The pressure exerted by each individual gas in a mixture of gases is called its pressure. This pressure is proportional to the f
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!