Question

Assertion and Reason Type:
Assertion (A): Radium is a radioactive element.
Reason (R) : Radium emits radiation,
a) Both A and R are true and R is the correct explanation of A
b) Both A and R are true but is not the correct explanation of A
C) A is true and R is false,
d) A is false and R is true.​

Answer 1

Answer:

b

Explanation:

Radium is a chemical element with the symbol Ra and atomic number 88. ... All isotopes of radium are highly radioactive, with the most stable isotope being radium-226, which has a half-life of 1600 years and decays into radon gas (specifically the isotope radon-222).

Radium emits alpha particles (two protons and two neutrons bonded together), beta particles (high energy electrons or positrons), and gamma rays (the most energetic wavelength of light), according to New World Encyclopedia. ... Alpha particles emitted by the radium kills the cancerous cells.