The document provides details on the structure of various atoms, including hydrogen, helium, lithium, beryllium, boron, and sodium. For each element, it lists attributes such as atomic number, mass number, number of protons, electrons, neutrons, and their electronic configuration. This information summarizes the basic atomic structure and properties of these elements.

1. STRUCTURE OF ATOM
Archa S R
BEd Physical Science

2. ORBIT ELECTRONIC
CONFIGURATION

3. HYDROGEN ATOM
1 P
0 N
• ATOMIC NUMBER = 1
• MASS NUMBER = 1
• NO. OF PROTONS = 1
• NO OF ELECTRONS = 1
• NO OF NEUTRONS = 0
• ELECTRONIC CONFIGURATION = 1

4. HELIUM ATOM
• ATOMIC NUMBER = 2
• MASS NUMBER = 4
• NO. OF PROTONS = 2
• NO OF ELECTRONS = 2
• NO OF NEUTRONS = 2
• ELECTRONIC CONFIGURATION = 2
2 P
2 n

5. LITHIUM ATOM
• ATOMIC NUMBER = 3
• MASS NUMBER = 7
• NO. OF PROTONS = 3
• NO OF ELECTRONS = 3
• NO OF NEUTRONS = 4
• ELECTRONIC CONFIGURATION = 2,1
3 P
4 n

6. BERYLIUM ATOM
• ATOMIC NUMBER = 4
• MASS NUMBER = 9
• NO. OF PROTONS = 4
• NO OF ELECTRONS = 4
• NO OF NEUTRONS = 5
• ELECTRONIC CONFIGURATION = 2,2
4 P
5 n

7. BORON ATOM
• ATOMIC NUMBER = 5
• MASS NUMBER = 10
• NO. OF PROTONS = 5
• NO OF ELECTRONS = 5
• NO OF NEUTRONS = 5
• ELECTRONIC CONFIGURATION = 2,3
5 P
5 n

8. SODIUM ATOM
• ATOMIC NUMBER = 11
• MASS NUMBER = 23
• NO. OF PROTONS = 11
• NO OF ELECTRONS = 11
• NO OF NEUTRONS = 12
• ELECTRONIC CONFIGURATION = 2,8,1
11P
12 n

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