10TH10TH ICSE MCQ ON PERIODIC TABLE -2 The periodic table lists all the elements, with information about their atomic weights, chemical symbols, and atomic numbers. The arrangement of the periodic table leads us to visualize certain trends among the atoms. The vertical columns (groups) of the periodic table are arranged such that all its elements have the same number of valence electrons. All elements within a certain group thus share similar properties.
The table is divided into four roughly rectangular areas called blocks. The rows of the table are called periods, and the columns are called groups. Elements from the same column group of the periodic table show similar chemical characteristics. Trends run through the periodic table, with nonmetallic character (keeping their own electrons) increasing from left to right across a period, and from down to up across a group, and metallic character (surrendering electrons to other atoms) increasing in the opposite direction. The underlying reason for these trends is electron configurations of atoms.
The first periodic table to become generally accepted was that of the Russian chemist Dmitri Mendeleev in 1869: he formulated the periodic law as a dependence of chemical properties on atomic mass. Because not all elements were then known, there were gaps in his periodic table, and Mendeleev successfully used the periodic law to predict properties of some of the missing elements. The periodic law was recognized as a fundamental discovery in the late 19th century, and it was explained with the discovery of the atomic number and pioneering work in quantum mechanics of the early 20th century that illuminated the internal structure of the atom. With Glenn T. Seaborg‘s 1945 discovery that the actinides were in fact f-block rather than d-block elements, a recognisably modern form of the table was reached. The periodic table and law are now a central and indispensable part of modern chemistry.
The periodic table continues to evolve with the progress of science. In nature, only elements up to atomic number 94 exist; to go further, it was necessary to synthesize new elements in the laboratory. Today, all the first 118 elements are known, completing the first seven rows of the table, but chemical characterization is still needed for the heaviest elements to confirm that their properties match their positions. It is not yet known how far the table will stretch beyond and whether the patterns of the known part of the table will continue into this unknown region. Some scientific discussion also continues regarding whether some elements are correctly positioned in today’s table. Many alternative representations of the periodic law exist, and there is some discussion as to whether or not there is an optimal form of the periodic table.
Table of Contents
10TH ICSE MCQ ON PERIODIC TABLE -2 TOPIC – PERIODIC TABLE MCQ
Answer key
Q.1 D
Q.2 B
Q.3 B
Q.4 A
Q.5 D
Q.6 C
Q.7 A
Q.8 C
Q.9 A
Q.10 D
Q.11 B
Q.12 D
Q.13 C
Q.14 D
Q.15 A
Q.16 A
Q.17 A
Q.18 D
Q.19 C
Q.20 C
Education World is providing comprehensive, expert and high level coaching forgovernment job Highly qualified and experienced faculty of each subject of government job .
Education World has ultra-modern infrastructure and the coaching is given through latest techniques. The excellent study material, assignments & worksheets prepared by the highly qualified and experienced staff of Education World are provided free to its regular students. Practice Tests and Mock Tests are conducted at regular intervals. Doubt Clearance Classes are also provided to the students.
The tricks and shortcut methods being taught in Education World are very helpful to thestudents to crack Exam. Besides this, Individual attention is paid to each student.
The mission of Education World is to impart value-based education to one and all at affordable cost. Therefore, very low fee is charged from students.
The vision of Education World is to shape up future leaders in all spheres of life.
Proper guidance is vital for any competitive exam. Coaching centres have qualified and experienced teachers, who have been in the coaching long enough to understand and identify the needs of the students. Their responsibility does not end with just teaching the curriculum and analyse test patterns. They provide relevant notes and printouts, exam-oriented suggestions, which help students to achieve their aims. They also clear their doubts.
The coaching classes play a very supportive role. They guide the students in the right direction by familiarising them with the range of content they must cover for the exams. They get proper orientation. It also helps them to develop their skills and abilities through assessment tests, Practice tests and mock tests.
WEBSITE NAME : eduworld24.com
YOUTUBE CHANNEL EDUCATION WORLD EW