That element would be carbon.
element K, or potassium
Arsenic (atomic number 33)
Cu
silver
vanadium
Niobium (Nb)
5B: [He] 2s2 2px1 or 5B: 1s2 2s2 2px1
Okay there has to be one.... I'm not sure either, i am doing a science project, so email me if u figure it out please! Its in the Vanadium Family :) ok person who eve wrote this vanadium is in the alkali metals family... oh and have fun with your science project -kodybear:)
2The answer is 1 or two but:-Copper has an electronic configuration of [Ar] 3d10 4s1Copper is a transition metal and the simple concept of valence electrons is difficult to apply to these. You could say 1, expecting the 4s electron to be lost, which does happen to form Cu+ , cuprous, compounds. However copper readily forms Cu2+ in cupric compounds, e.g. in copper sulfate. In these one of the d electrons is also lost to give a d9 configuration.Other oxidation states such as copper (III) and copper(IV) are known.
Explore key information about the chemical elements through this periodic table Group 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Period 1 1H 2He 2 3Li 4Be 5B 6C 7N 8O 9F 10Ne 3 11Na 12Mg 13Al 14Si 15P 16S 17Cl 18Ar 4 19K 20Ca 21Sc 22Ti 23V 24Cr 25Mn 26Fe 27Co 28Ni 29Cu 30Zn 31Ga 32Ge 33As 34Se 35Br 36Kr 5 37Rb 38Sr 39Y 40Zr 41Nb 42Mo 43Tc 44Ru 45Rh 46Pd 47Ag 48Cd 49In 50Sn 51Sb 52Te 53I 54Xe 6 55Cs 56Ba * 71Lu 72Hf 73Ta 74W 75Re 76Os 77Ir 78Pt 79Au 80Hg 81Tl 82Pb 83Bi 84Po 85At 86Rn 7 87Fr 88Ra ** 103Lr 104Rf 105Db 106Sg 107Bh 108Hs 109Mt 110Ds 111Rg 112Cp 113Uut 114Uuq 115Uup 116Uuh 117Uus 118Uuo *Lanthanoids * 57La 58Ce 59Pr 60Nd 61Pm 62Sm 63Eu 64Gd 65Tb 66Dy 67Ho 68Er 69Tm 70Yb **Actinoids ** 89Ac 90Th 91Pa 92U 93Np 94Pu 95Am 96Cm 97Bk 98Cf 99Es 100Fm 101Md 102No
Well it depends if you are an old schoool european or an old school american. Group 5B in Europe was the vanadium family so the answer would be Niobium, Nb in period 5. Group 5B in America was the nitrogen family so the answer would be antimony, Sb, in period 5. This confusion why there is an international convention that renumbered the groups, however it hasn't been universally adopted.
Niobium (Nb)
5b + 5b = 2 x 5b
The GCF is 5b.
2a+5b isn't possible the answer is still 2a+5b.
5b-15 = -10
15 = 5b
5b
5b-32
3a + (3b - 2a) + 5b =3a + 3b - 2a + 5b =(3a - 2a) + (3b + 5b) =a + 8b
5b + 3 = 10 - 3 - 3 5b = 7 5b/5 7/5 b= 1.5 There you go !
(5b - 4)(5b + 4)