Atomic structure

1. An atom’s electron arrangement is also known as its electron ___.2. A __ is composed of two or more atoms, joined together by covalentbonds.3. Almost all the volume occupied by an atom is ___ space.4. The total number of protons and neutrons in an atom is known as its___ number.5. At the centre of an atom is a very ___, very dense, positively-chargednucleus.6. The particle with no charge inside atoms is called the ___.7. The positively-charged particles inside atoms are called ___.8. Ions with a positive charge have ___ electrons.9. Positively-charged ___ particles were used to discover the structureof the atom.10. To calculate the number of neutrons, ___ atomic number from massnumber.