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The number of electrons in an atom of at...

The number of electrons in an atom of atomic number Z and mass number A is

A

zero

B

Z

C

A-Z

D

A

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • The number of nucleons in an atom of atomic number Z and mass number A is

    A
    zero
    B
    Z
    C
    A-Z
    D
    A

  • The number of protons in an atom of atomic number Z and mass number A is

    A
    zero
    B
    Z
    C
    A-Z
    D
    A

  • The number of electrons in an element with atomic number X and mass number Y will be

    A
    X - Y
    B
    Y-X
    C
    X + Y
    D
    X

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    Arrange the following statements in a sequence which involves the calculation of the atomic number and mass number for an atom of an element with 15 electrons and 16 neutrons. (1) A = Number of protons + Number of neutrons A = Z + Number of neutrons A = 15 + 16 = 31 (2) Number of protons and number of electrons are equal in a neutral atom. Hence, the atomic number Z is equal to 15. (3) Mass number is equal to the total number of protons and neutrons. (4) Atomic number is 15 and mass number is 31.

    Arrange the following statements in a sequence which involves the calculation of the atomic number and mass number for an atom of an element with 15 electrons and 16 neutrons. (a) A=Number of protons + Number of neutrons A=Z+ Number fo neutrons A=15+16=31 (b) Number of protrons and number of electrons are equal in a neutral atom. Hence the atomic number Z is equal to 15. (c) Mass number is equal to the total number of protons and neutrons. (d) Atomic number is 15 and mass number is 31.

    How many electrons does an atom with an atomic number of 20 and a mass number of 42 have?

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