ElementSymbolAtomicnumberAtomic radiusinnanometers
hydrogenH10.037
heliumHe20.05
lithiumLi30.152
berylliumBe40.111
boronB50.088
carbonC60.077
nitrogenN70.070
oxygenO80.066
fluorineF90.064
neonNe100.070
sodiumNa110.186
magnesiumMg120.160
aluminumAl130.143
siliconSi140.117
phosphorusP150.110
sulfurS160.104
chlorineCl170.099
argonAr180.094
potassiumK190.231
calciumCa200.197
scandiumSc210.162
titaniumTi220.146
vanadiumV230.134
chromiumCr240.127
manganeseMn250.126
ironFe260.126
cobaltCo270.125
nickelNi280.124
copperCu290.128
zincZn300.138
galliumGa310.122
germaniumGe320.122
arsenicAs330.121
seleniumSe340.117
bromineBr350.114
kryptonKr360.109
rubidiumRb370.244
strontiumSt380.215
yittriumY390.180
zirconiumZr400.160
niobiumNb410.146
molybdenumMo420.139
technetiumTc430.136
rutheniumRu440.134
rhodiumRh450.134
palladiumPd460.137
silverAg470.144
cadmiumCd480.154
indiumIn490.162
tinSn500.140
antimonySb510.141
telluriumTe520.137
iodineI530.133
xenonXe540.130
cesiumCs550.262
bariumBa560.217
lanthanumLa570.187
ceriumCe580.182
praseodymiumPr590.182
neodymiumNd600.182
promethiumPm61
samariumSm62
europiumEu630.204
gadoliniumGd640.179
terbiumTb650.177
dysprosiumDy660.177
holmiumHo670.176
erbiumEr680.175
thuliumTm690.174
ytterbiumYb700.193
lutetiumLu710.174
hafniumHf720.158
tantalumTa730.146
tungstenW740.139
rheniumRe750.137
osmiumOs760.135
iridiumIr770.136
platinumPt780.138
goldAu790.144
mercuryHg800.157
thalliumTl810.171
leadPb820.175
bismuthBi830.146
poloniumPo840.15
astatineAt850.14
radonRn860.14
franciumFr870.27
radiumRa880.220
actiniumAc890.2
thoriumTh900.180
protactiniumPa91
uraniumU920.14
neptuniumNp93
plutoniumPu94
americiumAm95
curiumCm96
berkeliumBk97
californiumCf98
einsteiniumEs99
fermiumFm100
mendeleviumMd101
nobeliumNo102
lawrenciumLr103
rutherfordiumRf104
dubniumDb105
seaborgiumSg106
bohriumBh107
hassiumHs108
meitneriumMt109
darmstadtiumDs110
roentgeniumRg111
coperniciumCn112
nihoniumNh113
fleroviumFl114
moscoviumMc115
livermoriumLv116
tennessineTs117
oganessonOg118

resources

www.rsc.org/periodic-table/

Both the content and design of this site created by the RoyalSociety of Chemistry (UK) are truly exceptional. Be sure to check out the videos.

You are watching: Which of the following atoms is the smallest?

The current version is at least the second. The animations in the original were huge for the time (hydrogen was about 12 megabytes), so downloading and saving them was a wise use of bandwidth—or one could buy a CD for $37 (20 pounds). Now the videos stream and the CD seems no longer on offer. We wish we had saved one of the first edition videos, for the sake of comparison.

Philip Ball.The Ingredients. A Guided Tour of the Elements.Oxford University Press, 2003.

See more: What Colleges Accept Cornerstone Christian Correspondence Diploma _万象客

John Emsley.Nature"s Building Blocks. An A-Z Guide to the Elements.Oxford University Press, 2002.


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