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
Tanzania [10]
3 years ago
10

The atomic weight of iodine is less than the atomic weight of tellurium. However, Mendeleev listed iodine after tellurium in his

original periodic table because he suspected the atomic weights for these elements were inaccurate. What was Mendeleev's reason for this suspicion?
Chemistry
1 answer:
QveST [7]3 years ago
3 0

Explanation :

As we know that Mendeleev arranged the elements in horizontal rows and vertical columns of a table in order of their increasing relative atomic weights.

He placed the elements with similar nature in the same group.

According to the question, the atomic weight of iodine is less than the atomic weight of tellurium. So according to this, iodine should be placed before tellurium in Mendeleev's tables. But Mendeleev placed iodine after tellurium in his original periodic table.

However, iodine has similar chemical properties to chlorine and bromine. So, in order to make iodine queue up with chlorine and bromine in his periodic table, Mendeleev exchanged the positions of iodine and tellurium.

As we know that the positions of iodine and tellurium were reversed in Mendeleev's table because iodine has one naturally occurring isotope that is iodine-127  and tellurium isotopes are tellurium-128 and tellurium-130.

Due to high relative abundance of tellurium isotopes gives tellurium the greater relative atomic mass.

You might be interested in
the half life for strontium-90 is 29 years. how many half-lives did the sample go through at the end of 87 year​
Nesterboy [21]
90 divided by 29 x 87 = 290
4 0
2 years ago
Read 2 more answers
A chemist adds of a M zinc nitrate solution to a reaction flask. Calculate the mass in grams of zinc nitrate the chemist has add
weqwewe [10]

corrected question: A chemist adds 135mL of a 0.21M zinc nitrate solution to a reaction flask. Calculate the mass in grams of zinc nitrate the chemist has added to the flask. Round your answer to significant digits.

Answer:

5.37g

Explanation:

0.21M means ; 0.21mol/dm³

1dm³=1L , so we can say 0.21mol/L

if 0.21mol of Zinc nitrate is contained in 1L of water

x   will be contained in 135mL of water

x= 0.21*135*10³/1

=0.02835moles

number of moles=  mass/ molar mass

mass= number of moles *molar mas

molar mass of Zn(NO₃)₂=189.36 g/mol

mass= 0.02835 *189.36

mass=5.37g

3 0
2 years ago
6. The nuclear reaction where Si-30 becomes P-30 is
Arisa [49]

Answer:c

Explanation:

8 0
2 years ago
How to differ mixture and compound? What are their differences? ​
Roman55 [17]

Explanation:

"Compound: A substance that is made up of more than one type of atom bonded together. 

Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties."

- Libre Texts

8 0
2 years ago
Read 2 more answers
How many grams are in 10 moles of methane, CH4?
ollegr [7]

the answer is twenty eight

6 0
2 years ago
Read 2 more answers
Other questions:
  • Calculate the Ka for 0.220 M solution of H3AsO4, pH = 1.50
    5·1 answer
  • The smallest units of matter that normally CANNOT be broken down are atoms. molecules. cells. phospholipids.
    12·1 answer
  • Real images can be projected onto a screen.<br> A. True<br> B. False
    13·1 answer
  • How many Electrons, Neutrons &amp; Protons do
    9·2 answers
  • SUSTANTIVO FORMA TAMANO CO
    12·1 answer
  • Do protons have attraction for neutrons yes or no
    5·1 answer
  • Which of the following statements are true?
    9·1 answer
  • Which forces can be classified as intramolecular?
    10·2 answers
  • If there are 12 people, and each person has 4 coins, there are ____ times as many coins as people.
    11·1 answer
  • What is conductivity? How is it measured?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!