1

IIT-JEE 1984

MCQ (More than One Correct Answer)
Many elements have non-integral atomic masses because:
A
they have isotopes
B
their isotopes have non-integral masses
C
their isotopes have different masses
D
the constitutents, neutrons, protons and electrons combine to give fractional masses
2

IIT-JEE 1984

MCQ (More than One Correct Answer)
When alpha particles are sent through a thin metal foil, most of them go straight through the foil because
A
alpha particles are much heavier than electrons
B
alpha particles are positively charged
C
most part of the atom is empty space
D
alpha particle move with high velocity
3

IIT-JEE 1984

MCQ (More than One Correct Answer)
An isotone of $${}_{32}^{76}Ge$$ is
A
$${}_{32}^{77}Ge$$
B
$${}_{33}^{77}Ge$$
C
$${}_{34}^{77}Ge$$
D
$${}_{34}^{78}Ge$$

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