Physics Quiz (Focus -- Periodic Table)

Q 1:The periodic table of the chemical elements (also periodic table of the elements or just the periodic table) is a tabular display of the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist ...................?
Mendel
Mendeleev
Newton

Q 2:The current standard periodic table contains ........ elements

120
118
117

Q 3:In the year 1817, Johann Wolfgang Döbereiner, a German
chemist, tried to arrange the elements with similar properties into groups.
He identified some groups having three elements each. So he called these
groups ..............
triplet
trio
triads

Q 4:..................................made the first observations on platinum as a catalyst and discovered similar triads of elements which led to the development of the Periodic Table of elements.
Mendel
Dobereiner
Mendeleev

Q 5:In 1866, ...........,an English scientist, arranged the then known elements in the order ofincreasing atomic masses. He started with the element having the lowest atomic mass (hydrogen) and ended at thorium which was the 56th element. He found that every eighth element had properties similar to that of the first. He compared this to the octaves found in music. Therefore, he called it the ‘Law of Octaves’.
Dobereiner
John Newlands
Mendeleev

Q 6:It was found that the Law of Octaves was applicable only upto..........
potassium
magnesium
calcium

Q 7:It was assumed by Newlands that only .... elements existed in nature and no more elements would be discovered in the future. But, later on, several new elements were discovered, whose properties did not fit into the Law of Octaves.
52
56
58

Q 8:Newlands’ Law of Octaves worked well with ........... elements only.
non metallic
lighter
higher

Q 9:Mendeléev formulated a Periodic Law, which states that ‘the properties
of elements are the periodic function of their atomic ............’.
nos
weights
masses

Q 10:Mendeléev left some gaps in his Periodic Table. Instead of looking upon these gaps as defects, Mendeléev boldly predicted the existence of some elements that had not been discovered at that time.Mendeléev named them by prefixing a Sanskrit numeral, .......... to the name of preceding element in the same group.
nada
Eka
para

Q 11:...........of all elements posed a challenge to Mendeleev’s Periodic Law.
Isotopes
Oxides
Hydroxides

Q 12:In 1913, .............. showed that the atomic number of an element
is a more fundamental property than its atomic mass.

Dobreinher
Mosely
Mendel

Q 13:Modern Periodic Law can be stated as follows:
‘Properties of elements are a periodic function of their atomic ...........’
mass
weight
number

Q 14:The Modern Periodic Table has .... vertical columns known as ‘groups’
and ... horizontal rows known as ‘periods’.
18,7
19,6
19,7

Q 15:Elements fluorine (F) and chlorine (Cl), belong to group ...
18
17
19

Q 16:The atomic radius of hydrogen atom is .... pm
1.8
1
37

Q 17:Atomic size ............ down the group.
increases
decreases
remains constant

Q 18:............ tend to lose electrons while forming bonds, that is, they are electropositive in nature.
Non-Metals
Metals
Metalloids

Q 19:As the effective nuclear charge acting on the valence shell electrons
increases across a period, the tendency to lose electrons of metals will.............
remains constant
increase
decrease

Q 20:Non-metals, on the other hand, are electronegative. They tend to form
bonds by gaining ............
electrons
protons
photons

Q 21:.......... even predicted the existence of some yet to be discovered elements on the basis of gaps in his Periodic Table
Mendeleev
Dobereiner
Newland

Q 22:Anomalies in arrangement of elements based on increasing atomic mass could be removed when the elements were arranged in order of increasing atomic number,
a fundamental property of the element discovered by .................

Newland
Mosely
Mendeleev

Q 23:Which of the following is the radioactive noble gas?
xenon
argon
radon

Q 24:The chalcogens are the chemical elements in group .....
16
18
15

Q 25:The halogens or halogen elements are a series of nonmetal elements from Group ........
19
17
16