Question 1

?-particle are

Accepted Answer

A) double positive helium nucleus 
B) single positive helium nucleus 
C) neutral helium atom 
D) None of these

Question 2

A divalent cation has 10 electrons and 12 neutrons. The atomic number and mass number of the elements are

Accepted Answer

A) 12, 24 
B) 10, 12 
C) 11, 25 
D) 8, 12

Question 3

A particle is projected up with an initial velocity of 80 ft/s. The ball will attain height of 96 ft/s from the ground after

Accepted Answer

A) 2.0 and 3.0 s 
B) Only at 3.0s 
C) Only at 2.0 s 
D) After 1 and 2 s

Question 4

Ohm's law is true

Accepted Answer

A) for gases at low temperature 
B) for metallic conductor 
C) for electrolytes when current passes through them 
D) for diode when current flows

Exam 11: Science

?-particle are