Which of the following statements is not true?
|. Electrons have greater mass than protons and neutrons
||. Protons and neutrons are in the nucleus
|||. Protons and electrons are charged subatomic particles
|V. Electrons are located outside the nucleus

  The nuclear symbol for an isotope of iodine is$^{125}_{53}$.Which of the following is correct?

  

  Which of the following is not a physical property of an isotope of an element with fewer neutrons in its atom?

  The isotopes of carbon $^{12}C$ and $^{13}C$.

|. have the same atomic number
||. have the same physical properties
|||. have the same chemical properties

  How many electrons are there in $^{35}_{17}$CI$^{1-}$?

  The following table shows the number of subatomic particles present in five species.
Species A Number of protons is 8,Number of neutrons is 8,Number of electrons is 8
Species B Number of protons is 8,Number of neutrons is 8,Number of electrons is10
Species C Number of protons is 9,Number of neutrons is 10,Number of electrons is 8
Species D Number of protons is 10,Number of neutrons is 10,Number of electrons is 10
Species E Number of protons is 10,Number of neutrons is 12,Number of electrons is 10

  Which of the following statements about $^{51}_{23}V$ are correct?

|. It has 23 protons
||. It has 51 nucleons
|||. It has a condensed electron configuration of [Ne] $4s^23d^3$

  The following table shows the number of subatomic particles present in five species.
Species A Number of protons is 8,Number of neutrons is 8,Number of electrons is 8
Species B Number of protons is 8,Number of neutrons is 8,Number of electrons is 10
Species C Number of protons is 9,Number of neutrons is 10,Number of electrons is 8
Species D Number of protons is 10,Number of neutrons is 10,Number of electrons is 10
Species E Number of protons is 10,Number of neutrons is 12,Number of electrons is 10
Which two species are ions?

  Bromine has 2 stable isotopes: bromine-79 and bromine-81. What is the relative atomic mass of bromine (Br)?
Isotope is $^{79}$Br,Relative Abundance is 50.69%,Atomic Mass is 78.92
Isotope is $^{81}$Br,Relative Abundance is 49.31%,Atomic Mass is 80.92

  The atom of element X has a mass number of 127 and has 74 neutronsrwo8 wstvum,u /46 zfz;l+p.p. The ion derived fro8wu of,vt;pmzpl/ 6+r 4zsu.wm X has 54 electrons.

1.Calculate the number of protons of element X.  
2.State the nuclear symbol of the ion formed (refer to the periodic table).
3.An isotope of X has a mass number of 132. Determine the number of neutrons in its atom.  neutrons

  Complete the following tabldeuj f1- yy8,;nl,tp yc3ui(t e:

Nuclear Symbol	Number of protons	Number of neutrons	Number of electrons
$^{153}_{62}$Sm			62
	81	120
$^{56}_{26}Fe^{2+}$	26
$^{103}_{46}$Pd	46
	16	16	18

  Lithium is a low-density alkali metal that r n8e an)ta)h-adiha00 eacts vigorously with water.
1.Given the below data and referring to the periodic table, calculate the relative abundances of the isotopes of lithium.
Isotope is $^6$Li, Atomic Mass is 6.015
Isotope is $^7$Li, Atomic Mass is 7.016
The relative abundances of each isotope are   % for Li-6 and  %for Li-7
2.State the definition of an isotope.
3.Outline the concept of relative abundance.

  Element Y has 4 stable isotopes. T;spj yqa8ojf uvj-..4 he table below shows the relative abundance and atomic massepaj.ov -f4j8u sy;qj .s of these isotopes.

Isotope 1, Percent abundance is 1.40%, Atomic mass is 203.97
Isotope 2, Percent abundance is 24.10%, Atomic mass is 205.97
Isotope 3, Percent abundance is 22.10%, Atomic mass is 206.98
Isotope 4, Percent abundance is 52.40%, Atomic mass is 207.98
1.Calculate the relative atomic mass of the element.  
2.Identify the element.
3.The atom of the element can form an ion with a charge of 4+. Determine the number of electrons in the ion.  
4.Determine the nuclear symbol of another corresponding ion of element Y given the numbers of subatomic particles: electrons = 80; neutrons = 122.

  What is the relative atomic mass of an element with the following isotopic mass data?
Isotope mass is 150%,abundance is 22.00

Isotope mass is 151%,abundance is 51.00

Isotope mass is 152%,abundance is 27.00

  A sample of chlorine gas contains the isotopes $^{35}Cl$and $^{37}Cl$.In the mass spectrum of a sample of chlorine gas, what is an interpretation of the peak at 74m/z?

  Element Z consists of two isotopes: $^{38}Z$ and $^{39}Z$.What is the approximate natural abundance of $^{38}Z$?

$M_r$(Z)=38.92

  What is the relative atomic mass of an element with the following mass spectrum?

  The mass spectrum of chlorinzgygete(e,r7x dit,q 1;2ic, e gas is shown below:

1.Calculate the relative molecular mass of chlorine gas using the mass spectrum.  
2.State the identity of the particle responsible for the peak at 35 m/z.
3.Calculate the relative atomic mass of chlorine using the mass spectrum.