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Self-Test 2.1
Give the correct answer for each question
1. Which subatomic particles are referred to as nucleons?
2. It is the area surrounding the nucleus of an atom where electrons
are located?
3. What is the symbol for electron?
4. Who discovered protons?
5. What do you call the neutrally charge particle?
6. What subatomic particle that is negatively charge?
7. Who discovered electron?
8. What do you call the center of the atom?
9. Who discovered neutron?
10. Which subatomic particle has no charge?​

Sagot :

CLMD

Answer:

1. Nucleon, either of the subatomic particles, the proton and the neutron, constituting atomic nuclei. Protons (positively charged) and neutrons (uncharged) behave identically under the influence of the short-range nuclear force, both in the way they are bound in nuclei and in the way they are scattered by each other.

2. Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

3. e-

4. E. Rutherford

5. The neutron is a neutral particle, which is stable only in the confines of the nucleus of the atom. Outside the nucleus, the neutron decays with a mean lifetime of about 15 min. Its mass, like that of the proton, is equivalent to 1 u (atomic mass unit).

6. Electrons

A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge. An atom usually contains an equal number of positively charged protons and negatively charged electrons.

7. J.J. Thomson

8. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

9. James Chadwick

10. Neutron

Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67493 × 10−27 kg—marginally greater than that of the proton but nearly 1,839 times greater than that of the electron.

Explanation:

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