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Isotopes have...

Isotopes have

A

same physical and chemical properties

B

same physical properties but different chemical properties

C

same chemical properties but different physical properties

D

different physical and chemical properties.

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The correct Answer is:
### Step-by-Step Solution: 1. **Definition of Isotopes**: Isotopes are variants of a particular chemical element that have the same number of protons (atomic number) but different numbers of neutrons, leading to different atomic masses. 2. **Same Atomic Number**: Since isotopes have the same atomic number, they have the same number of electrons. This means that they will exhibit the same chemical behavior because chemical properties are primarily determined by the electron configuration. 3. **Different Atomic Mass**: The difference in the number of neutrons results in different atomic masses for the isotopes. This difference affects their physical properties, such as density, melting point, and boiling point. 4. **Chemical vs. Physical Properties**: Because isotopes have the same electron configuration, they will have identical chemical properties. However, their different atomic masses lead to variations in physical properties. 5. **Example of Isotopes**: A common example is the isotopes of hydrogen: protium (1H), deuterium (2H), and tritium (3H). All have the same atomic number (1) but different atomic masses (1, 2, and 3 respectively). They exhibit similar chemical properties but differ in physical properties like boiling and melting points. ### Conclusion: Isotopes have the same chemical properties but different physical properties due to their identical atomic numbers and varying atomic masses. ---
### Step-by-Step Solution: 1. **Definition of Isotopes**: Isotopes are variants of a particular chemical element that have the same number of protons (atomic number) but different numbers of neutrons, leading to different atomic masses. 2. **Same Atomic Number**: Since isotopes have the same atomic number, they have the same number of electrons. This means that they will exhibit the same chemical behavior because chemical properties are primarily determined by the electron configuration. 3. **Different Atomic Mass**: The difference in the number of neutrons results in different atomic masses for the isotopes. This difference affects their physical properties, such as density, melting point, and boiling point. ...
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Fill in the blanks in the following statements: (a) Rutherford's alpha - particle scattering experiment led to the discovery of the ........ . (b) Isotopes have same......but different ....... . (c) Neon and chlorine have atomic numbers 10 and 17 respectively. Their velencies will be ...... and ......respectively (d) The electronic configuration of silicon is......and that of sulphur is........... .

Fill in the blanks in the following statements. (a) Rutherford's alpha -particle scattering experiment lead to the discovery of the …….. . (b) Isotopes have same……… but different……. . (c) Neon and chlorine have atomic numbers 10 and 17 respectively. Their valencies will be...... and........ respectively. (d) The electronic configuration of silicon is .......... and that of sulphur is........ .

Knowledge Check

  • Isotopes are the atoms of same element, they have same atomic number but different mass numbers. Isotopes have different number of neutrons in their nucleus . If an element exists in two isotopes having atomic masses 'a' and 'b' in the ratio m:n, then average atomic mass will be (mxxa+nxxb)/(m+n) Different isotopes of same element have same position in the periodic table. the elemens which have single isotope are called monoisotropic elements. Greater is the percentage composition of an isotope, more will be its abundance in nature. The isotopes of chlorine with mass number 35 and 37 exist in the ratio of. . . .. Its average atomic mass is 35.5.

    A
    `1:1`
    B
    `2:1`
    C
    `3:1`
    D
    `3:2`

  • Isotopes are the atoms of same element, they have same atomic number but different mass numbers. Isotopes have different number of neutrons in their nucleus . If an element exists in two isotopes having atomic masses 'a' and 'b' in the ratio m:n, then average atomic mass will be (mxxa+nxxb)/(m+n) Different isotopes of same element have same position in the periodic table. the elemens which have single isotope are called monoisotropic elements. Greater is the percentage composition of an isotope, more will be its abundance in nature. .^(12)C and .^(14)C isotopes are found at 98% and 2% respectively in any sample. then, the number of .^(14)C atoms in 12g of the sample will be:

    A
    1.5 mole atoms
    B
    `1.032xx10^(22)` atoms
    C
    `2.06xx10^(21)` atoms
    D
    2g atoms

  • Isotopes are the atoms of same element, they have same atomic number but different mass numbers. Isotopes have different number of neutrons in their nucleus . If an element exists in two isotopes having atomic masses 'a' and 'b' in the ratio m:n, then average atomic mass will be (mxxa+nxxb)/(m+n) Different isotopes of same element have same position in the periodic table. the elemens which have single isotope are called monoisotropic elements. Greater is the percentage composition of an isotope, more will be its abundance in nature. Which of the following isotopes is/are used to decide the scale of atomic mass?

    A
    `._(6)^(12)C`
    B
    `._(6)^(14)C`
    C
    `_(8)^(16)O`
    D
    `._(7)^(14)N`

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    Complete the following statements : (a) Magnesium has 2 valence electrons in the ……… shell (b) The valency of nitrogen in N_(2) molecule is …….. (c) Isotopes have different mass numbers because their nuclei contain different number of ........ (d) Some boron atoms have mass number 10 and some have mass number 11. These boron atoms with different mass numbers are called ........

    (a) Two stable isotope of ._3Li^6 and ._3Li^7 have respective abundances of 7.5% and 92.5% . These isotopes have masses 6.01512 and 7.01600 u respectively. Find the atomic weight of lithium. (b) Boron has two stable isotopes ._5B^(10) and ._5B^(11) . Their respective masses are 10.01294 u and 11.00931u, and the atomic weight of boron is 10.81u. Find the abundaces of ._5B^(10) and ._5B^(11) .

    Two isotopes of radioactive Radon gas -R_(n)^(222) and R_(n)^(220) are mixed in atomic ratio 1000:1 and kept in a 831cm^(3) container at 10^(5) N//m^(2) pressure and 27^(@)C temperature the two isotopes have half life of 4 days and 1 minute respectively. Calculate the activity of Radon gas sample in unit of curie.

    Isotopes are the atoms of same element, they have same atomic number but different mass numbers. Isotopes have different number of neutrons in their nucleus . If an element exists in two isotopes having atomic masses 'a' and 'b' in the ratio m:n, then average atomic mass will be (mxxa+nxxb)/(m+n) Different isotopes of same element have same position in the periodic table. the elemens which have single isotope are called monoisotropic elements. Greater is the percentage composition of an isotope, more will be its abundance in nature. The ratio of mass of .^(12)C atom to that of an atom of element X(whose atomicity is four) is 1:9. the molecular mass of element X is:

    Assertion: The chemical properties of different isotope are same. Reason: Isotopes having same number of neutron.

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