explain the structure of modern periodic table
Answers
ɪɴ ᴛʜᴇ ᴍᴏᴅᴇʀɴ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ, ᴛʜᴇ ᴇʟᴇᴍᴇɴᴛs ᴀʀᴇ ᴀʀʀᴀɴɢᴇᴅ ɪɴ ᴛʜᴇ ᴏʀᴅᴇʀ ᴏғ ᴛʜᴇɪʀ ɪɴʀᴇᴀsɪɴɢ ᴀᴛᴏᴍɪᴄ ɴᴜᴍʙᴇʀ. ɪɴ ᴛʜᴇ ᴍᴏᴅᴇʀɴ ᴘᴇʀɪᴏᴅɪᴄ ᴛᴀʙʟᴇ ᴛʜᴇʀᴇ ᴀʀᴇ sᴇᴠᴇɴ ʜᴏʀɪᴢᴏɴᴛᴀʟ ʀᴏᴡs ᴄᴀʟʟᴇᴅ ᴘᴇʀɪᴏᴅs ᴀɴᴅ ᴇɪɢʜᴛᴇᴇɴ ᴠᴇʀᴛɪᴄᴀʟ ᴄᴏʟᴜᴍɴs (1 ᴛᴏ 18) ᴄᴀʟʟᴇᴅ ɢʀᴏᴜᴘs. ᴛʜᴇ ᴀʀʀᴀɴɢᴇᴍᴇɴᴛ ᴏғ ᴛʜᴇ ᴘᴇʀɪᴏᴅs ᴀɴᴅ ɢʀᴏᴜᴘs ʀᴇsᴜʟᴛs ɪɴᴛᴏ ғᴏʀᴍᴀᴛɪᴏɴ ᴏғ ʙᴏxᴇs.
Answer:
In the modern periodic table, the elements are arranged in the order of their inreasing atomic number. In the modern periodic table there are seven horizontal rows called periods and eighteen vertical columns (1 to 18) called groups. The arrangement of the periods and groups results into formation of boxes. Atomic numbers are serially indicated in the upper part of these boxes.
(2) Each box represents the place for one element. Apart from these seven rows. there are two rows of elements placed separately at teh bottom of the periodic table. They are lantanides and actinides series. There are 118 places for elements in the modern periodic table. The formation of a few elements was established experimentally very recently and thereby the modern periodic table is now completely filled with 118 elements.
(3) On the basis of the electronic configuration, the elements iin the modern periodic table are divided into four blocks, viz. s-block, p-block, d-block and f-block. The s-block constitue groups 1 and 2 . The groups 13 to 18 constitute the p-block. Groups 3 to 12 constitute teh d-block, while the lanthanide and actinide series at the elements. A zig-zag line is shown in the p-block of the periodic table. This zig-zag line shows the three traditional types of elements. i.e, metals, nonmetals and metalloidsl. The metalloid elements lie along the border of zig-zag line. All the metals lie on the left side of the zig-zag line while all the nonmetals lie on the right side.
Explanation: