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natita [175]
2 years ago
8

Which block of elements do the halogens belong to? a. p block c. d block b. s block?

Chemistry
1 answer:
kykrilka [37]2 years ago
4 0
A. p block

from 3a-8a are in the p block including halogen
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Answer:

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Explanation:

The exploitation of the wood was an intense activity and that did not have any regulation that would limit its damages, caused by its exploratory activities.

As the timber market was totally undisciplined, the exploitation of the wood caused a strong deforestation, leaving the soil totally unprotected and susceptible to strong erosion.

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The number of positive changes in the nucleus of an atom is equal to
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Answer:

The number of positive charges in nucleus of an atoms are equal to the atomic number and also positive charges are equal to the negative charges which are electrons in neutral atom.

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

Electron:

The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.

Symbol= e⁻

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It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.

Neutron and proton:

Neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.

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Mass of neutron=1.674929×10⁻²⁷ Kg

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The carbon have six protons and six neutrons so its atomic mass is 12 amu and atomic number is six.

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