Periodicity Crossword Puzzle
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QUESTIONS LIST:
- period : the line across the periodic table.
- group : the column down the periodic table.
- atom : the smallest particle that makes up everything.
- element : the substances that are made of only one type of atoms.
- molecule : particles that are made of to or more atoms.
- mixture : two substances mixed together and not chemically bonded.
- compound : substances that are made of different atoms chemically bonded together.
- electron : the subatomic particle that has charge of -1 but no mass.
- proton : the subatomic particle that has charge of +1 and mass of 1.
- neutron : the subatomic particle that has no charge and mass of 1.
- ion : the particle formed when an atom gains or loses electrons.
- metal : the type of elements that are hard, shiny and are good conductors.
- non-metal : the type of elements that are usually soft, dull and good insulators.
- alkali metal : the group that can react with water to form alkali.
- group four : the group that can form very large molecules.
- halogen : the group of elements that contain solids, liquid and gases.
- noble gas : the group of elements that contain only inert gases.
