Atoms and Bonding Crossword Puzzle

QUESTIONS LIST:

• alloy : an _ is a mixture made of two or more elements, at least one of which is a metal.
• negative : when a neutral atom gains an electron, it gains negative charge and becomes a _ ion.
• freely : metals conduct electric current easily because the valence electrons in a metal can move _ among the atoms.
• high : ionic compounds have _ melting points.
• compound : when a positive and negative ion bond, they form an ionic _ .
• metallic : a _ bond is the attraction between a positive metal ion and the electrons surrounding it.
• molecule : a _ is a neutral group of atoms joined by covalent bonds.
• three : group 13 elements have _ valence electrons.
• bond : a chemical _ is the force of attraction that holds atoms together as a result of the arrangement of electrons between them.
• covalent : the chemical bond formed when two atoms share electrons is called a _ bond.
• crystals : ionic solids are _ that have an orderly, three-dimensional arrangement.
• double : when two atoms share two pairs of electrons, it forms a _ bond.
• low : molecular compounds have _ melting points and boiling points.
• poor : molecular compounds are _ conductors.
• electric : ionic compounds conduct _ current when dissolved in water.
• ionic : an _ bond is the attraction between two oppositely charged ions.
• ion : an _ is an atom or group of atoms that has en electric charge.
• valence : the _ electrons of an atom are those electrons that have the highest energy.
• polar : a covalent bond in which electrons are shared unequally, is a _ bond.
• formula : a chemical _ is a group of symbols that shows the ratio of elements in a compound.
• gain : nonmetal atoms become stable when they _ or share enough electrons to have eight valence electron
• positive : when a neutral atom loses a valence electron, it loses negative charge and becomes a _ ion.
• losing : metal atoms react by _ their valence electrons.