Lithium, sodium and potassium form a Dob...

Lithium, sodium and potassium form a Dobereiner's triad. The atomic masses of lithium and potassium are 7 and 39 respectively. Predict the atomic mass of sodium.

Text Solution

Verified by Experts

Atomic mass of sodium `Na = (7 + 39)/2 = 46/2 = 23`
The atomic mass of Na = 23.

Topper's Solved these Questions

PERIODIC CLASSIFICATION OF ELEMENTS
ZEN PUBLICATION|Exercise ZEE ADDITIONAL QUESTIONS SECTIONS (SHORT ANSWER (SA) TYPE QUESTIONS)|69 Videos
PERIODIC CLASSIFICATION OF ELEMENTS
ZEN PUBLICATION|Exercise ZEE ADDITIONAL QUESTIONS SECTIONS (LONG ANSWER (LA) TYPE QUESTIONS)|6 Videos
PERIODIC CLASSIFICATION OF ELEMENTS
ZEN PUBLICATION|Exercise ZEE ADDITIONAL QUESTIONS SECTIONS (MULTIPLE CHOICE QUESTIONS)|35 Videos
METALS AND NON METALS
ZEN PUBLICATION|Exercise ZEN ADDITIONAL QUESTIONS SECTION (LONG ANSWER [LA] TYPE 2 QUESTIONS)|14 Videos

Similar Questions

Explore conceptually related problems

Chlorine, Bromine and Iodine form a Dobereiner’s triad. The atomic masses of Chlorine and iodine are 35.5 and 126.9 respectively. Predict the atomic mass of Bromine.

In a triad of three elements A, B, and C, the atomic mass of A and B are 80 and 120 respectively. Find the atomic mass of element C.

The atomic number and atomic mass of iron are 26 and 56 respectively.Find the number of protons and neutrons in its atom.

Two elements X and Y have the same atomic mass but this atomic number are 20 and 21 respectively X and Y are

a] Lithium, sodium, and potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements? b] Helium is an unreactive gas and neon is a gas of extremely low reactivity. What, if anything, do their atoms have in common?

The three stable isotopes of neon: ""_(10)^(20)Ne,""_(10)^(21)Ne and ""_(10)^(22)Ne have respective abundances of 90.51%, 0.27% and 9.22%. The atomic masses of the three isotopes are 19.99 u, 20.99 u and 21.99 u, respectively. Obtain the average atomic mass of neon.

Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. (a) Is there any similarity in the atoms of these elements?

r_1 and r_2 are the radii of atomic nuclei of mass numbers 64 and 27 respectively. The ratio r_1//r_2 is

ZEN PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ZEE ADDITIONAL QUESTIONS SECTIONS (VERY SHORT ANSWER (VSA) TYPE QUESTIONS)

Write the atomic numbers of two elements X and Y having electronic con...
Text Solution
|
Account for the following: Elements of group 17 are monovalent.
Text Solution
|
Account for the following: Elements of group 18 are zerovalent.
Text Solution
|
Elements A, B, C, and D have atomic numbers 1, 8, 11, and 19 respectiv...
Text Solution
|
Out of the two elements X and Y which has a bigger atomic radius? (i...
Text Solution
|
Out of the two elements, potassium and sodium, which one can lose elec...
Text Solution
|
Mention the type of compounds formed between group 1 and group 17 elem...
Text Solution
|
Write the number of vertical columns in the periodic table. What are t...
Text Solution
|
Write the number of horizontal rows in the modern periodic table. What...
Text Solution
|
Predict the maximum number of valence electrons possible for atoms in ...
Text Solution
|
What is the nature of oxides formed by most of p - block elements ?
Text Solution
|
Explain the acidic character of oxide of elements down a group and acr...
Text Solution
|
Why hydrogen should be placed in group I ?
Text Solution
|
Out of Li and K which has strong metallic character?
Text Solution
|
List any two properties of the elements belonging to the first group m...
Text Solution
|
Write the formula used to determine the maximum numbers of electrons w...
Text Solution
|
Name the element and its valency which is having electronic configurat...
Text Solution
|
Lithium, sodium and potassium form a Dobereiner's triad. The atomic ma...
Text Solution
|
What do you mean by valency?
Text Solution
|
Sodium and potassium are placed in the same group of modern periodic t...
Text Solution
|