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 nume( evo2b7e(72f0 xnnr0jd ue lber of 127 and has 74 neutrons. The ion derived from X has 54 electrons. (j( 7f7be2 eeu0no20dxnevl r

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 sx5 cl9;btr-oq )q0ln;ho: gy table:

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 t dt21a(.ejgb,h8eh cgq )x,valkali metal that reacts 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. Tha3 z0gmo q*+xue table below shows the relative abundance and atomic masses of these isotopes. zu+mox3qa0*g

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 chlorine gas hb,xat 9t6ty zp ti 7:swa),4dis 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.