In the graphic X represents which element? 31 15 11x А B 31 Gallium 15 Phosphorus P 46 Palladium Pd Ga​

B. X represents phosphorus

Explanation:

In an isotope symbol, you write the mass number above the atomic number. So the 31 represents the mass of the protons and neutrons of the element added together, and the 15 represents the atomic number or the total number of protons in the nucleus.

passing a magnet thought the

mixture , because iron gets attracted to magnet .

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.