ପରମାଣୁ

ରାସାୟନିକ ମୌଳିକ କିମ୍ବା ଏହାର ସମସ୍ଥାନିକ ଗୁଡ଼ିକର କ୍ଷୁଦ୍ରତମ ଅଂଶକୁ ପରମାଣୁ କୁହାଯାଏ । ଭୂ-ପୃଷ୍ଠର ଅଧିକାଂଶ ବସ୍ତୁ ଏହି ପରମାଣୁ ଗୁଡ଼ିକର ସମାହାରରେ ଗଢ଼ା । ଏହାର ଆକାରକୁ ପିକୋମିଟରରେ ମପା ଯାଇଥାଏ ।

ହିଲିଅମ ପରମାଣୁ
Helium atom ground state.
An illustration of the helium atom, depicting the nucleus (pink) and the electron cloud distribution (black). The nucleus (upper right) in helium-4 is in reality spherically symmetric and closely resembles the electron cloud, although for more complicated nuclei this is not always the case. The black bar is one angstrom (୧୦−୧୦ମି or ୧୦୦pm).
ବିଭକ୍ତିକରଣ
ରାସାୟନିକ ମୌଳିକର ଗୁଣ ଧାରଣ କରୁଥିବା କ୍ଷୁଦ୍ରତମ ଅଂଶ
ଗୁଣ-ଧର୍ମ
ବସ୍ତୁତ୍ଵ ସୀମା: ୧.୬୭×୧୦−୨୭ ରୁ ୪.୫୨×୧୦−୨୫kg ଯାଏଁ ବୈଦୁତିକ ଚାର୍ଜ: ଶୁନ (neutral), କିମ୍ବା ଆୟନ ଚାର୍ଜ ବ୍ୟାସ ସୀମା: ୬୨ pm (He) ରୁ ୫୨୦ pm (Cs) (କିଛି ଅଧିକ ତଥ୍ୟ) ଅବପରମାଣବିକ କଣିକା: ପ୍ରୋଟୋନ ଓ ନିଉଟ୍ରନକୁ ନେଇ ଗଠିତ ନ୍ୟୁକ୍ଳିଅସ ଓ ତା'ଚାରିପଟେ ଥିବା ଇଲେକ୍‌ଟ୍ରୋନର ବାଦଲ

ବାହାର ଲିଙ୍କ

• Francis, Eden (2002). "Atomic Size". Clackamas Community College. Archived from the original on 4 February 2007. Retrieved 9 January 2007.
• Freudenrich, Craig C. "How Atoms Work". How Stuff Works. Archived from the original on 8 January 2007. Retrieved 9 January 2007.
• "The Atom". Free High School Science Texts: Physics. Wikibooks. Retrieved 10 July 2010.
• Anonymous (2007). "The atom". Science aid+. Archived from the original on 22 January 2010. Retrieved 10 July 2010.—a guide to the atom for teens.
• Anonymous (3 January 2006). "Atoms and Atomic Structure". BBC. Archived from the original on 2 January 2007. Retrieved 11 January 2007.
• Various (3 January 2006). "Physics 2000, Table of Contents". University of Colorado. Archived from the original on 14 January 2008. Retrieved 11 January 2008.
• Various (3 February 2006). "What does an atom look like?". University of Karlsruhe. Archived from the original on 17 April 2010. Retrieved 12 May 2008.