2. Atoms & Elements

Give the correct number of protons, neutrons and electrons for the following isotope:.

In which pair are the two species both isoelectronic and isotopic?

One isotope of a metallic element has a mass number of 65 and 35 neutrons in the nucleus. The cation that this atom forms has 28 electrons. What is the symbol of the cation?

Which of the following is the symbol for the ion with a +4 charge, 30 neutrons and 21 electrons?

Fill in the gaps for the following table.

A nitride ion has 7 protons, 8 neutrons, and 10 electrons. what is the overall charge on this ion?

When electrons are removed from the outermost shell of a calcium atom, the atom becomes?

An atom that gains or loses an electron has a net electric charge and is called a/n.