Particles Theory Crossword Puzzle

QUESTIONS LIST:

• particles: include atom, molecules, and ions.
• atom: the smallest particle that makes up everything.
• ion: the particle formed when atom lose or gain electrons.
• molecules: made of two or more atoms chemically bonded together.
• element: made of only one type of atom.
• compound: made of more than one type of atoms chemically bonded together.
• proton: the particle in an atom that has mass of 1 and charge of +1.
• neutron: the particle in an atom that has mass of 1 and charge of 0.
• electron: the particle in an atom that has mass of 1/1840 and charge of -1.
• nucleus: the centre of an atom.
• electron shell: the orbit outside of an atom where electrons can be found.
• atomic number: equals to the number of protons.
• mass number: equals to the number of neutrons.