is this correct . Which particle has a negative charge?

A. Alpha particle
B. Positron
C. Neutron- Correct answer
D. Beta particle

2. Which particle has the same mass as an electron, but a positive electric charge?
A. Alpha particle
B. Gamma photon
C. Proton
D. Positron- Correct answer

3. Which of the following gives the correct order for energies of portions of the electromagnetic spectrum?
A. radio > visible light > gamma > ultraviolet > infrared
B. visible light > ultraviolet > infrared > radio > gamma
C. radio > infrared >ultraviolet > gamma > visible light
D. gamma > ultraviolet > visible light > infrared > radio- Correct answer

4. Which of the following affects the half-life of a radioactive sample?
A. The age of sample- Correct answer
B. The size of the sample
C. The temperature of the sample
D. None of these