1

### IIT-JEE 1986

MCQ (More than One Correct Answer)
The sum of the number of neutrons and proton in the isotope of hydrogen is
A
6
B
2
C
4
D
3
2

### 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
3

### 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
4

### 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
${}_{34}^{78}Ge$