Table:
text: Atomic radii of the elements (data page)
Atomic radii
Atomic radii
number_ symbol name_ empirical_ Calculated van_der_Waals Covalent_single_bond Covalent_triple_bond
1 H hydrogen 25 53 120 38 no data
2 He helium no data 31 140 32 no data
3 Li lithium 145 167 182 134 no data
4 Be beryllium 105 112 153 a 90 85
5 B boron 85 87 192 a 82 73
6 C carbon 70 67 170 77 60
7 N nitrogen 65 56 155 75 54
8 O oxygen 60 48 152 73 53
9 F fluorine 50 42 147 71 53
10 Ne neon no data 38 154 69 no data
11 Na sodium 180 190 227 154 no data

Question: What is the atomic radius of the elements (data page) that is the covalent (single bond) value of sodium?