题目内容

When an electron is removed from an atom, the atom is said to be __.

A. Radioactive
B. Excited
C. Ionized
D. Metastable

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The following unit is used to measure the quantify of energy except___.

A. Electron volt
B. Hertz
C. Joule
D. Erg

Which of the following is not equal to one Gray?

A. 1.0 Joule/kg
B. 1.0 Sv/QF(quality factor)
C. l00 rads
D. 100 ergs/gram

X-rays are made up of ___.

A. electrons
B. protons
C. photons
D. Neutrons

The term used to describe the loss of excess energy by the nucleus of radioactive atoms is called ____.

A. decay (disintegration)
B. ionization
C. scintillation
D. Activation