Sodium has the electronic configuration 2,8,1, indicating that it belongs to Group 1 (alkali metals) in the periodic table. The single electron in its outermost shell makes it highly reactive. Key Points: 1. Sodium’s atomic number is 11. 2. It reacts vigorously with water to form sodium hydroxide. 3. It is used in street lighting (sodium vapor lamps). 4. Stored in oil to prevent reactions with air or moisture. 5. Plays a key role in the human body for nerve transmission. Bee Facts: • Magnesium (a): Configuration 2,8,2, used in alloys. • Chlorine (b): Configuration 2,8,7, a halogen. • Hydrogen (c): Configuration 1, simplest element. • Sodium (d): Alkali metal, essential for life processes.
A statement is given, followed by two assumptions I and II. You have to consider the statement and two assumptions and decide which of the assumption(s)...
Statements:
I. People for now, have avoided going to the area around ‘Block D’.
II. The police authority has recently caught a...
Statement: G > J > H ≤ I = U < S
Conclusions: I. J < S II. G ≤ I
Statement: A construction worker was buried alive when mud from a 20-ft high pit collapsed on him and four others.
Assumption I: The other ...
Statement: The forest department has embarked on an initiative to plant six crore saplings in the state.
Assumptions:
I. The areas wh...
Statement: D < R = X > T ≥ H
Conclusions: I. D ≤ T II. R > H
Statement: As an ongoing mission to help taxpayers, the e-portal service has been set up by the Additional Commissioner of Income Tax at the taxpayer...
Statement: The Kabini Backwaters, a paradise for elephants in scorching summer, is a let-down for wildlife this year owing to extreme drought.
...Statement: Scores of students and parents staged a sit-down protest outside the Department of Public Instruction (DPI) for not intervening and initia...
The increased caseload and mortality due to the disease this year compared with last year could be because pre-existing immunity through exposure to the...
