PLEASE ANSWER ALL QUESTIONS! THANK YOU :) Answer the Q.\'s on a separate sheet o
ID: 490549 • Letter: P
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PLEASE ANSWER ALL QUESTIONS! THANK YOU :)
Answer the Q.'s on a separate sheet of paper, with your name and date. Give the no. of electrons, protons and neutrons in each of the following nuclides:^23 _11Na^16_8O^235_92 U^15_7N What are the superscript numbers 23, 16, 235 and 15 above called, and what do they represent; What are the subscript numbers 11, 6, 92 and 7 above called, and what do they represent, and; What are the names of the above elements? Are they found in nature, or are they man made? What does the abbreviation ammo stand for and how is it defined? What are isotopes, and; What are the differences between these 3 isotopes of hydrogen:? H-l; H-2; H-3 What are their names, and are they all found in nature? Which of these isotopes is most abundant? How many electrons can be accommodated in each of the following 'shells' and what is the value of the principal quantum (n) number for each shell? K L M NExplanation / Answer
1) nucleides protons electrons neutrons(mass number - atomic number)
11-Na -23 11 11 12
8 -O -16 8 8 8
92 -U -235 92 92 143
7 N15 7 7 8
2)
a) The superscipt numbers repressent the sum of protons and nutrons in the nucleus of an atom.
It is called mass number represented by letter A.
b) the subscript numbers reprsent the number of protons in the nucleus of an atom. It is called atomic number .
represented by letter Z.
c) sodium , oxygen, uranium and nitrogen
d) Na , O U and N all given nucleides are naturally occuring.
3) The term 'amu' stand for atomic mass unit.
It is arelative value with no actual units.
It is defined as the ratio of actual mass of an atom to the mass of 1/12 th of mass of a C-12 isotope atom.
isotopes are atoms of same element having same atomic number but different mass number . Thus they have same number of electrons, protons and different neutrons.
b)The three isotopes of H are
H-1, H-2 and H-3 which have one proton, one electron each and onetron, one neutron and 2 netrons respectivley.
c) H-1 is called protium , H-2 is called deuterium or heavy hydrogen and H-3 is called Tritium.
Only Hydrogen and deuterium are found in nature but tritium is radioactive , not found in nature.
d) Most abundant is H-1 , >99% in naturally occuring H.
4) shell n value maximum number of electrons(2n2)
K n =1 2
L n=2 8
M n=3 18
N n =4 32
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