Does positive (metals) ion loose or gain electron

What is the element with the same atomic number but different of neutrons .

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

the positively charged subatomic particle contained in the nucleus of an atom

an arrangement of the elements according to their atomic numbers so that elements with similar properties are in the same column and properties repeat from row to row

an atom or group of atoms that has gained or lost one or more electrons and is now either positively or negatively charged

one of several forms of a single element, which contains the same number of protons, but different numbers of neutrons