They too have a mass of 1amu. The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge neutral. This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral. Structure of the atom Everything in the world is made up of atoms.
These are just names for the positive and negatively charged ions, to help distinguish them from neutral atoms and from each other. The important thing to understand about ions is that they are the only types of atom with a net charge. The position of an element on the periodic table see Resources tells you the type of ions it will form, with the elements on the right forming anions negative charge and those further to the left forming cations positive charge.
The first two groups have elements with only one or two electrons in their outer shells, group 1 and 2 respectively. Lee Johnson is a freelance writer and science enthusiast, with a passion for distilling complex concepts into simple, digestible language. He's written about science for several websites including eHow UK and WiseGeek, mainly covering physics and astronomy. He was also a science blogger for Elements Behavioral Health's blog network for five years.
He studied physics at the Open University and graduated in What is a Monatomic Ion? Chemistry Matter Net Charge. Apr 4, See below. Explanation: Electric charge is determined by subatomic particles called "electrons" and "protons". Atoms are not always electrically neutral, we call these atoms "ions".
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