{"id":114,"date":"2015-11-25T04:33:00","date_gmt":"2015-11-25T04:33:00","guid":{"rendered":"https:\/\/rijankc.com.np\/2015\/11\/25\/05-atomic-weight\/"},"modified":"2024-11-03T22:05:46","modified_gmt":"2024-11-03T16:20:46","slug":"05-atomic-weight","status":"publish","type":"post","link":"https:\/\/rijankc.com.np\/?p=114","title":{"rendered":"05. Atomic Weight"},"content":{"rendered":"
Atomic Weight is the average relative weight per atom of an element according to their abundance considering an atom of C12<\/sup> isotopes as 12 amu.
\nFor Example:
\nNaturally occurring Chlorine contains 75% Cl35<\/sup> and 25% Cl37<\/sup>, so atomic of Chlorine
\n<\/a> <\/p>\n

In other words, atomic weight is the number which show how many times an atom of an element is heavier that 1\/12th<\/sup> part of an atom of\u00a0 12<\/sup>Cl isotopes.<\/p>\n

Fractional Atomic Weight:<\/b>
\nAtomic Weight is the average\u00a0 weight per atom of an element. So it can be in fraction due to the presence of isotopes.
\nFor Example:
\nNaturally occurring Chlorine contains 75% Cl35<\/sup> and 25% Cl37<\/sup>, so atomic of Chlorine
\n<\/a><\/p>\n

 <\/p>\n

Gram Atomic Weight:<\/b>
\nWhen atomic weight of an element is expressed in gram. Then it is called gram atomic weight. One gram atomic weight of each element contains 6.023\u00d71023<\/sup> atoms.<\/p>\n

<\/a><\/div>\n

 <\/p>\n

 <\/p>\n

For eg.
\nAtomic Weight of Sodium = 23
\n23 gram sodium = 1 gram atom of sodium
\n=\u00a0 6.023\u00d71023<\/sup> atoms of sodium<\/p>\n

Q. Calculate the number of gram atoms and atoms of sodium present in 60 gram of sodium.<\/b><\/i>
\nSolution:
\nGiven,
\nWeight of Sodium = 60 gram
\nAtomic Weight of Sodium = 23
\nNo. of gram atoms of sodium = ?
\nNo. of atoms of sodium = ?<\/p>\n

<\/a><\/div>\n

 <\/p>\n

\u00a0<\/a><\/div>\n

<\/a><\/p>\n

1 gram atom = 6.023\u00d71023<\/sup> atoms
\n2.608 gram atoms = 6.023\u00d71023<\/sup>\u00d72.608 atoms
\n= 1.57\u00d71024<\/sup> atoms
\n
\n<\/b><\/i>
\nQ.What is the weight of one atom of sodium?<\/b><\/i>
\nSolution:
\nAtomic Weight of sodium = 23
\n23 gram of sodium = 1 gram atom of sodium
\n= 6.023\u00d71023<\/sup> atoms of sodium
\n6.023\u00d71023<\/sup> atoms of sodium = 23 gram<\/p>\n

<\/a><\/div>\n

 <\/p>\n

 <\/p>\n

= 3.81\u00d710-23<\/sup> gram.
\n
\n<\/b><\/i>
\n
\n<\/b><\/i>
\nQ.What is the weight of 1 amu carbon?<\/b><\/i>
\nAtomic weight of carbon = 12
\n12 gram of carbon = 1 gram atom of carbon
\n=\u00a0 6.023\u00d71023<\/sup>atoms of carbon
\n= 6.023\u00d71023<\/sup>\u00d712 amu<\/p>\n

6.023\u00d71023<\/sup>\u00d712 amu = 12 gram
\n<\/a><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Atomic Weight is the average relative weight per atom of an element according to their abundance considering an atom of C12 isotopes as 12 amu. For Example: Naturally occurring Chlorine contains 75% Cl35 and 25% Cl37, so atomic of Chlorine   In other words, atomic weight is the number which show how many times an […]<\/p>\n","protected":false},"author":1,"featured_media":704,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[110],"tags":[],"class_list":["post-114","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chemistry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/rijankc.com.np\/index.php?rest_route=\/wp\/v2\/posts\/114","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rijankc.com.np\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rijankc.com.np\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rijankc.com.np\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rijankc.com.np\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=114"}],"version-history":[{"count":2,"href":"https:\/\/rijankc.com.np\/index.php?rest_route=\/wp\/v2\/posts\/114\/revisions"}],"predecessor-version":[{"id":681,"href":"https:\/\/rijankc.com.np\/index.php?rest_route=\/wp\/v2\/posts\/114\/revisions\/681"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rijankc.com.np\/index.php?rest_route=\/wp\/v2\/media\/704"}],"wp:attachment":[{"href":"https:\/\/rijankc.com.np\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rijankc.com.np\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rijankc.com.np\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}