Structure Of An Antom Short Question With Answer: General Science Cadet College Test
Structure Of An Antom Short Question With Answer: General Science Cadet College Test
| Class: | General | Subject: | General |
| Chapter: | All | Board: | All Boards |
Important Short Questions: This page contains solved short questions for General General All. These questions are frequently asked in All Boards past papers. Memorize them for full marks.
Q.No.01: Define an atom. Give an example?
Ans: The smallest particle of the matter that cannot exist independently is called an atom.
Example: C, H, O etc.
Example: C, H, O etc.
Q.No.02: What is nucleus?
Ans: Nucleus is a central part of an atom. It consists of protons and neutrons.
Q.No.03: What is the difference between electron and proton?
Ans: Electron has a negative charge and moves around the nucleus.
Proton has a positive charge and is found inside the nucleus.
Proton has a positive charge and is found inside the nucleus.
Q.No.04: What are neutrons?
Ans: Neutrons are subatomic particles. It has no charge on it. It is present in the nucleus. The mass of a neutron is equal to protons.
Q.No.05: Why are atoms neutral particles?
Ans: An atom is a neutral particle because the electrons outside the nucleus and protons inside the nucleus are equal in number. So, total positive charge is balanced by total negative charge.
Q.No.06: Define atomic number?
Ans: The number of protons present in the nucleus of an atom is called atomic number. It is represented by Z.
Q.No.07: Define mass number?
Ans: The sum of protons and neutrons inside the nucleus is called mass number. It is represented by A.
Q.No.08: What is a shell?
Ans: The path of the movement of electrons around the nucleus are called shells. Shells are also called energy levels.
Q.No.09: How shells are labeled in an atom?
Ans: The shells are labeled as K, L, M, N …… where K is the first shell nearest to the nucleus, L is second shell and so on.
Q.No.10: Calculate number of electrons in L & M shell?
Ans: The number of electrons can be calculated by 2n² formula.
In L or shell number 2, no. of electrons = 2n² = 2(2)² = 8
In M or shell number 3, no. of electrons = 2n² = 2(3)² = 18
In L or shell number 2, no. of electrons = 2n² = 2(2)² = 8
In M or shell number 3, no. of electrons = 2n² = 2(3)² = 18
Q.No.11: Define valency and give an example?
Ans: The capacity of an atom to combine with another atom is called valency.
Example: Hydrogen shares one electron, so its valency is 1.
Example: Hydrogen shares one electron, so its valency is 1.
Q.No.12: Define Ion?
Ans: An atom with positive or negative charge is called ion.
Example: Sodium ion (Na⁺)
Example: Sodium ion (Na⁺)
Q.No.13: What is the difference between cation and anion?
Ans: Cation: A positive ion. It is formed when an atom loses electrons.
Anion: A negative ion. It is formed when an atom gains electrons.
Anion: A negative ion. It is formed when an atom gains electrons.
How to Write Perfect Short Answers?
In Board Exams, the examiner looks for specific keywords and presentation. Here is how to attempt All questions:
- Ideal Length: Write 3 to 5 lines for each short question. Too short gets fewer marks, too long wastes time.
- Highlighting: Use a Blue Marker to highlight key dates, names, or scientific terms in your answer.
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