A valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
Ionic bonding is the complete transfer of valence electron(s) between atoms. Sodium (2,8,1) has 1 electron more than a stable noble gas structure (2,8). If it gave away that electron it would become more stable. Chlorine (2,8,7) has 1 electron short of a noble gas structure (2,8,8). If it could gain an electron, it would become stable. If a sodium atom gives an electron to a chlorine atom, both become stable.
Q5. Which of the following is equivalent to 1 Kilobyte?
निम्नलिखित में से क्या 1 किलोबाइट के तुल्य होता हैं?
The kilobyte is a multiple of the unit byte for digital information. The International System of Units (SI) defines the prefix kilo as 1000 (103); therefore one kilobyte is 1000 bytes or 1024 bytes in binary system.
Sodium bicarbonate is a chemical compound with the formula NaHCO₃. It is a salt composed of sodium ions and bicarbonate ions. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder. It is known by common name baking soda.
Q8. A computer language that expresses the presentation of structured documents, such as CSS, is called _______.
वह कंप्यूटर भाषा, जो संचरित की प्रस्तुति को व्यक्त करती हैं, जैसे सी एस एस _______कहलाती है|
After the start of the British Raj, the Ganesha festival lost state patronage and became a private family celebration in Maharashtra until its revival by Indian freedom fighter and social reformer Lokmanya Tilak.
Q10. What happens when one S and one P orbital is hybridized?
जब एक S और P कक्षीय को संकरित किया जाता हैं तब क्या होता है?
(a) We get three orbitals in a plane/ हमे एक समतल पर तीन कक्ष प्राप्त होते है
(b) We get two orbitals at 180 degrees/ हमे 180 अंशों पर दो कक्ष प्राप्त होते है
(c) We get two mutually perpendicular orbitals/ हमे दो आपस में लम्ब कक्ष प्राप्त होते है
(d) We get four orbitals directed tetrahedrally/ हमे टेट्रा हेड्रॉन रूप से निर्देशित चार कक्ष प्राप्त होते है