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 mas8;6+2or lj j v bcw8q:.f+qnikiizrl; /l xe/ms number of 127 and has 74 neutrons. The ion derived i i;m:b6cjql kz/jq;l8.e8/ f vlrxr2+o n+iwfrom 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 t lxh,l nqotqsb.w0*71able:

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-densw6ej 29xe/wedj a6v ,zity alkali 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. The table 2 yuwr iuc3+3p -*tftebelow shows the relative abundance and atomic massew3 p t uf+2yu3*tecr-is 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 chlorine gas is 6 l (+mpx(vdmvshown 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.