One instrument used to measure ionizing radiation is a radioactive counter. Curi

Question

One instrument used to measure ionizing radiation is a radioactive counter. Curie counter. Roentgen counter. Geiger counter. Who discovered radioactivity? Curie Roentgen Becquerel Geiger A nucleon is the sum of all the subatomic particles in an atom. all of the protons in the nucleus. the protons and neutrons in the nucleus. all of the neutrons in the nucleus. Which of the following types of radioactive decay does not produce a new clement? electron capture gamma emission alpha emission beta emission Which one of the following is an incorrect representation of the indicated particle or nucleus? neutron^1_0n alpha particle^4_2He beta particle^-1_0e proton^1_1p

Explanation / Answer

3. A nucleon is one of the particles that contributes to make the nucleus of an atom. There are two typea of nucleons. They are protons and neutrons. All the protons in the nucleus can be called nucleons and all the neutrons in the nucleus can be called as nucleons also.. all B C and D statements are correct.

4. Beta emission is simillar to the emission of electron. Electron capture is gaining electrons. All alpha emission beta emission and electron capture are creating new elementa. But in gamma emission,most of the times no any creation of a new element because gama ray is only a form of elwctromagnetic radiation. Therefore we can say B is corrwct.

5. Upper no of the atom is the mass no = total neutrons and protons in the nucleus.

Latter no is the atomic no=no of total protons

All the other denotions are correct except for beta. There nos should be interchanged.

There we should know alpha particles= He atom.

Tberefore correct answers are A C D

1. Geiger Counter. This can detect alpha gama and beta particles

2. Roentengen diacovered x- rays. It can be identified as the 1st step of radioactivity. Then further examined by Curie and Becquerel.

Therefore all 3 scientists can be conaidered as the ones who investigated radioactivity. A B C

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