10. PERIODIC TABLE Flashcards
Who gave the law of triads?
Doberiener
. Law of octaves was given by -
Newlands
Mendeleev Periodic Law was -
The properties of the elements are periodic function of their atomic weights
A plot of ___ vs atomic number gave a straight line. (JEE)
√v (v is the frequency of X-ray emitted)
The elements with atomic no. 117 and 119 will be named as - (NEET)
Ununseptium and Ununennium
The compounds of s block with the exception of ___ and ___ are predominantly ionic
Li and Be
Reactivity always decrease down the group. T/F (JEE)
F
In case of alkali metals, reactivity increase/decrease down the group.
Increase
In case of halogens, reactivity increase/decrease down the group.
Decrease
First I.E, trend of the elements of 2nd period is - (NEET)
Li < B < Be < C < O < N < F < Ne
Across the period, increasing shielding outweighs nuclear charge
F
_____ assigned an arbitrary electronegativity value of ___ to F.
Pauling, 4
The electronegativity of any given element is not constant. T/F
T
Electronegativity varies depending on the element it is bound. T/F
T
Electronegativity decreases from left to right. T/F
F
