The overall charge of any compound is going to be zero. ag has a charge of +1 and co3 has a charge of -2. if we add the charges for only one of each ion together +1 + -2 = -1. but -1 cannot be the charge of the compound, so how many more ag+1 should we add to make the charge = 0? if we have 2 ag+1 and 1 co3-2, let’s add those charges together. +1 + +1 + -2 = 0. so we have to have two ag+1 and one co3-2 to make a compound. what does that look like?

The compound would be written as Ag2CO3

That look like that the compound is Ag2CO3

Explanation:

Ag2CO3 is an ionic compound. It's composed by two Ag+1 (each one with one positive charge) and one CO3-2 (with two negative charges) so that the overall charge of the compound is zero. The addition of charges is 2*1 + (-2) = 0.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.