Following elements are present in the second period of the periodic table from left to right. Li, Be, B, C, N, O, F, Ne Few statements are given about these elements: (i) O and F exist as monatomic gases. (ii) Li is the lightest element in the period. (iii) B is a metalloid while C is a metal. (iv) Li and F react to form a compound LiF. The correct statements are A.

What type of questions asked from the lesson of magnetic effect of electric current 

Wavelength of green light is

A) 400-450 nm

B) 500-550 nm

C) 660-720 nm

D) 720-800 nm

What is the difference between anaerobic & aerobic respiration? Name some organism that uses the aerobic mode of respiration?

What are the main components of our environment? Explain each of them briefly.

What are examples of hydrotropism plants?