Respuesta :
Answer:
Option A is correct. Statements b,c and d are true
Explanation:
Step 1: Data given
Proton = a subatomic particle with a positive electric charge of +1 and a mass slightly less than that of a neutron.
Neutron = a subatomic particle of about the same mass as a proton but without an electric charge
electron = a subatomic particle whose electric charge is negative one elementary charge.
The mass of an electron is only about 1/2000 the mass of a proton or neutron, so electrons contribute virtually nothing to the total mass of an atom
Step 2: Statements
(a) Protons have a charge of -1.
This is false. Protons have a charge of +1
(b) Neutrons have no charge.
This is true
(c) An electron has negligible mass compared to the mass of a neutron
This is true
(d)Number of proton equals to number of electrons on a stable atom
This is true. A stable atom has a charge of 0. this means the same amount of protons and electrons
Option A is correct. Statements b,c and d are true
The correct option is option (A).
The statements b,c, and d are correct.
Elementary particles:
(a) The statement that protons have a charge of -1 is false. The protons are positively charged particles and contain a relative charge of +1.
(b) The statement that neutrons have no charge is true. Since neutrons are neutral particles they do not carry any charge, they are bound in the nucleus by the strong nuclear force.
(c) An electron has negligible mass compared to the mass of a neutron is true. The mass of an electron is 9.1 × 10⁻³¹ kg, whereas that of a neutron is 1.67 × 10⁻²⁷ kg.
So the neutron is almost 1838 times heavier than the electron. Therefore, as compared to the mass of a neutron, an electron has negligible mass.
(d) Number of protons equals to the number of electrons on a stable atom is true. In a neutral atom, the number of protons is equal to the number of electrons.
Learn more about elementary particles:
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