How many potassium atoms and how many oxygen atoms are there in a binary compound made from these two elements? one potassium and two oxygen

two potassium and one oxygen

three potassium and one oxygen

one potassium and one oxygen

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

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I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.