plz help to slove class 9 ch 4 strucrure of atoms
Answers
Answer:
Protons are positively charged particles. Electrons are negatively charged particles. Neutrons are neutral particles which mean that they have no charge.
They are present inside the nucleus. They are present outside the nucleus and revolve around the nucleus. They are present inside the nucleus.
They have a mass of 1.67×10−27kg . They have a mass of 9.1×10−31kg They have a mass of 1.67×10−27kg .
Protons are represented as p+ Electrons are represented as e− Neutrons are represented as n
A proton is said to be very stable whether it's in its free state or inside the atoms. They do not decay spontaneously. Electrons are stable. An atom is said to be stable if its outermost shell has electrons to complete the octet. They are unstable and decay liberating beta particles.
The atomic number of an element is equal to the number of protons in the atom. The number of electrons and protons are equal in an atom. The mass number of an atom is the sum of number of protons and number of neutrons.
2.proton
3.electorn
4.In atomic physics, the Bohr model depicts an atom as a small, positively charged nucleus surrounded by electrons. These electrons travel in circular orbits around the nucleus—similar in structure to the solar system, except electrostatic forces rather than gravity provide attraction.
7.The electronic configuration of the element is – K=2, L=8,m=4. According to the electronic configuration the valency is +4 or -4 because silicon can either gain 4 electrons or lose 4 electrons because it is a noble gas. Hence, valency of silicon is 4.
Explanation:
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Answer:
1. Protons - Protons are positively charged particles.
Electrons - Electrons are negatively charged particles.
Neutrons - Neutrons are neutral particles which mean that they have no charge.
Explanation:
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