Easy
Besides gallium,which other elements have since been discovered that were left by Mendeleev in his Periodic Table? (any two)
(N/A) Mendeleev predicted the existence of several elements that had not been discovered at that time. He named them Eka-boron,Eka-aluminium,and Eka-silicon. These were later discovered and named as Scandium $(Sc)$,Gallium $(Ga)$,and Germanium $(Ge)$ respectively. Therefore,besides Gallium,the other two elements are Scandium and Germanium.
Explore More
Similar Questions
An atom has an electronic configuration of $2, 8, 7$.
$(a)$ What is the atomic number of this element?
$(b)$ To which of the following elements would it be chemically similar? (Atomic numbers are given in parentheses.)
$N(7), F(9), P(15), Ar(18)$
$(a)$ What is the atomic number of this element?
$(b)$ To which of the following elements would it be chemically similar? (Atomic numbers are given in parentheses.)
$N(7), F(9), P(15), Ar(18)$
Medium
View SolutionHelium is an unreactive gas and neon is a gas of extremely low reactivity. What,if anything,do their atoms have in common?
Easy
View SolutionWhat were the criteria used by $Mendeleev$ in creating his Periodic Table?
Medium
View SolutionWhat were the limitations of Newlands' Law of Octaves?
Medium
View SolutionThe position of three elements $A$, $B$, and $C$ in the Periodic Table are shown below:
Group $16$ Group $17$ - - - $A$ - - $B$ $C$
$(a)$ State whether $A$ is a metal or non-metal.
$(b)$ State whether $C$ is more reactive or less reactive than $A$.
| Group $16$ | Group $17$ |
| - | - |
| - | $A$ |
| - | - |
| $B$ | $C$ |
$(a)$ State whether $A$ is a metal or non-metal.
$(b)$ State whether $C$ is more reactive or less reactive than $A$.
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo