atomic #
what is the atomic # for boron
what is five
what is the mass of magnesium
what is 12
what is the isotopes form of zirconium
40zr
what are the protons of yttrium
39
what is the symbol of hafnium
HF
what is the atomic number of MN
what is 25
what is the mass of he
2
what is the isotopes form of ta
ta73
what are the protons of DB
105
what is the symbol for tantalum
ta
what is the atomic number of fe
what is 26
what is the mass of co
27
what is the isotopes form of re
re75
what are the protons of ir
77
what is the symbol for hydrogen
what is the atomic number of cu
what is 29
what is the mass of ni
28
what is the isotopes form of os
os76
what are the protons of sg
106
what is the symbol for chromium
cr
what is the atomic number of v
23
what is the mass of v
23
what is the isotopes form of lu
lu71
what are the protons of rf
104
what is the symbol for niobium
nb