In the modern periodic table, which are the metals among the first ten elements?

Academic Chemistry NCERT Class 10

The first ten elements in modern periodic table are hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon. Out of these, lithium, beryllium and boron are metals, because they have 1, 2 and 3 electrons respectively in their outermost shells.

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Updated on: 13-Mar-2023

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(a) In the modem periodic table, which are the metals among the first ten elements?(b) What is the significance of atomic number in the modern classification of elements? Explain with the help of an example.
Compare and contrast the arrangement of elements in Mendeleev’s Periodic Table and the Modern Periodic Table.
State the Periodic Law on which the Modern Periodic Table is based.
(a) On which side of the periodic table will you find metals?(b) On which side of the periodic table will you find non-metals? (c) What is the name of those elements which divide metals and non-metals in the periodic table?
Electronegativity of Elements in Modern periodic Table
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The basis for Modern Periodic Table is ______________.
Non-metals are located on the _____________ side of the Periodic Table.
How could the modern periodic table remove various anomalies of Mendeleev’s Periodic Table?
List the valency of the first 30 elements of the periodic table.
Development of Modern Periodic Table
Which of the following statement is correct in regard to the classification of elements ?(a) Elements in the periodic table are arranged on the basis of increasing atomic masses (b) Elements in Mendeleev’s periodic table are arranged on the basis of increasing atomic numbers (c) In modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass (d) In modern periodic table, the isotopes of chlorine having diffrenet atomic masses are kept in the same group.
How many horizontal rows are there in the modern periodic table and what are they called?
(a) How were the positions of isotopes of an element decided in the modern periodic table?(b) How were the positions of cobalt and nickel resolved in the modern periodic table? (c) Where should hydrogen be placed in the modern periodic table? Give reason for your answer.
What is the total number of non-metals in the periodic table?

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