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WorksheetsCLASSIFICATION OF ELEMENTS -GRAND TEST
Total questions: 25
Worksheet time: 19mins
EKABORON , EKA ALUMINIUM AND EKA SILICON REPRESENT WHICH OF THE FOLLOWING SETS OF ELEMENTS?
SCANDIUM,GALLIUM,GERMANIUM
GERMANIUM, SCANDIUM,GALLIUM,
GALLIUM,SCANDIUM ,GERMANIUM
GALLIUM,GERMANIUM, SCANDIUM
An element ‘A’ belongs to the third period and group 16 of the Periodic Table. Find out the valency of A.
(a) Valency = 6
(b) Valency = 2
(c) Valency = 1
(d) Valency = 3
Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
(a) Group 8
(b) Group 2
(c) Group 18
(d) Group 10
The arrangement of elements in the Modem Periodic Table is based on their
(a) increasing atomic mass in the period
(b) increasing atomic number in the horizontal rows
(c) increasing atomic number in the vertical columns
(d) increasing atomic mass in the group
The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element
(a) Scandium
(b) Germanium
(c) Gallium
(d) Aluminium
Which one is correct about mendeleev's periodic law
Properties of elements are periodic function of their atomic mass
the physical and chemical properties of elements are periodic function of their atomic number.
physical properties of elements are periodic function of their atomic weight.
chemical properties of elements are periodic function of their atomic number.
Protons and neutrons are found in the center of the atom called the:
nucleus
neutron
shell
cell
Hydrogen is a ____________.
Metal
Non-metal
Which of the blocks on the periodic table contains the most elements?
s block
p block
d block
f block
Eka boron is
Germanium
Gallium
Scandium
Aluminum
Which of the following is the limitation to Newland's classification
Newlands assume that most of elements existed were gases
Iron which resembles Cobalt and calcium was placed far away from these elements
Newland assumed that only 45 elements existed
Newlands law of classification was limited only upto calcium
Which of the following were not included in the mendeleev periodic table ?
Halogens
Alkali metal
Non metals
Isotopes
Which was the first classification of elements ?
Newlands law of octaves
Dobernier Triads
Metal and non metal
Mendeleev periodic table
The first periodic table was given by
Mendeleev
Newland
Dobernier
Moseley
An element X forms an oxide of X²O³. In which of the following group of mendeleev's periodic table is this element placed
Group 2
Group 3
Group 5
Group 8
In mendeleev's periodic table, gap was not left for one of the following elements
Gallium
Beryllium
Germanium
Scandium
Given that XYZ are triads. Atomic masses of X and Z are32, 125 respectively. then what is the atomic mass of Y is ?
157
93
78.5
77,5
A and B are two elements having similar properties which obey the law of octaves. how many elements are there in between A and B?
8
7
6
3
The most significant contribution towards the development of periodic table was made by
Mendeleev.
Avogadro.
Dalton.
Cavendish.
Which one of the following elements do not constitute a Doebereiner's triad ?
Cl,Br, I
Li,Na,K
S,Se,Te
N,P,As
Up to which element,law of octaves found to be applicable
Oxygen
Calcium
Cobalt
Potassium
Newlands relation is called
a) Musical Law
(b) Law of Octaves
(c) Periodic Law
(d) Atomic Mass Law
Pick out the chemically most reactive elements from the given triads.Li, Na, K F, Cl, Br
(a) Li and F
(b) Li and Br
(c) K and F
(d) K and Br
