Fundamentals of Chemistry Crossword Puzzle

QUESTIONS LIST:

• radioactive decay : can burn and cause cancer.
• amu : atomic mass unit.
• ion : an atom or group of atoms that has a positive or negative electric charge.
• neutrons : a particle that has no electric charge and it is located in the atom's nucleus.
• protons : a positively charged particle located in an atom's nucleus.
• radioactivity : the process by which the nucleus of an atom of an element releases energy and particles.
• metalloid : an element that has properties of both metals and nonmetals.
• negative ion : a atom that has more electrons.
• electron cloud : tons positive and negative electrons surrounding the nucleus.
• period : a horizontal row in the periodic table of elements.
• isotope : an atom of one element that has a different number of neutrons than another atom of the same element.
• group : a vertical column in the periodic table of the elements.
• lanthanides : rare earth metals that are used for coating tv tubes.
• noble [inert] gases : elements that never react with other elements.
• alkali metal : a reactive group in the periodic table.
• electrons : an negatively charged particle located outside an atom's nucleus.
• atomic number : the number of protons in the nucleus of an atom.
• transition metal : are the earliest known elements.
• actinides : elements 90-103.
• nonmetal : an element that is not metal and has the opposite properties of metal.
• halogens : combine easily with many elements.
• metal : an element that tends to be shiny, easily shaped, and a good conductor of electricity and heat.
• positive ion : a atom that has fewer electrons.
• alkaline metals : less reactive metals.
• nucleus : the central region of atom where most of the atom's mass is found in protons and neutrons.