AIEEE Questions

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The system unit of a personal computer typically contains microprocessor, disk controller and serial interface but it does not contain modem.

A trampoline is a sheet or web supported by springs in a metal frame and is used as spring board.

Foot ball game lasts for 60 minutes in total. It is divided into 4 quarters of 15 minutes each and two halves of 30 minutes each.

A practice to learn something is a Lesson.

A promise. 

The Promise made to somebody by you can be break but you cannot touch it.

For neutral atoms, the periodic trends in atomic size can be described like this

Atomic size decreases when going from left to right across a period,
Atomic size increases when going from top to bottom down a group.

Let's use these trends to try and figure out which atom would have the largest radius.

If you look at elements that are located in the same group, potassium will have a larger atomic radius when compared with sodium. Likewise, bromine will have a larger atomic radius when compared with chlorine.

Now focus on potassium and bromine. Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.

Joseph Priestley and Carl Wilhelm Scheele both independently discovered oxygen in the year 1774, but Priestly is usually given credit for the discovery.