Want this question answered?
Sb Antimony
Strontium is an element (38Sr) in period 5 with 38 protons, and being neutral it has 38 electrons also.However, also 37Rb- ion would have 38 electrons, but with only 37 protons in period 5.
The isotope boron-11 has 5 protons and 6 neutrons, but also 5 electrons not 8.
The mass is protons + neutrons. So, if the mass is 9 and it has 5 neutrons, then there must be FOUR (4) protons. This would be the element beryllium (Be).
boron10 would be the isotope that matches these descriptions
It's Zirconium.
Sb Antimony
The isotope of zirconim, 91Zr, has 51 neutrons. In order to solve this problem, one must know that an element's atomic weight is the average of its number of protons and neutrons (only neutrons are variable). Since the atomic number is the number of protons, the atomic number subtracted from the atomic weight gives the number of neutrons. An element in period 5 that has this many neutrons is found to be zirconium (the isotope 91Zr).
Boron
The element is sulphur. It has 5 valence electrons and 16 neutrons.
Antimony (Sb, # 51) has 5 valence electrons (and so do all the other elements in that group.)
Boron has 5 neutrons and 5 protons for its most common isotope
Berylium
Beryllium
The chemical element with the atomic number 51 is Antimony (Sb). Antimony is a Metalloid in Group 15(5) of the Periodic Table. It has 51 electrons in 5 electron shells with 5 electrons in the outer shell.
The element with 5 fewer electrons than sodium is not a gaseous element!
Strontium is an element (38Sr) in period 5 with 38 protons, and being neutral it has 38 electrons also.However, also 37Rb- ion would have 38 electrons, but with only 37 protons in period 5.