Terms
The tiny particles that make up matter
Atoms
Neutral
The most common alkaline earth metal; an ingredient in calcium carbonate
Calcium
A nobel gas used in balloons and lasers
Helium
What is a geometric arrangement of atoms called?
A crystal
The tiny, extremely dense core of an atom
A substance that is composed of only one type of atom bonded together
Element
A solid halogen that sublimes when heated; used in iodized salt and medical antiseptics
Iodine
A noble gas used in signs and lasers
Neon
Chemical reaction
One of the two kinds of particles that make up the nucleus of an atom; has a neutral charge
Neutrons
One of the two kinds of particles that make up the nucleus of an atom; has a positive charge
Protons
Sodium
A halogen used in toothpaste, coolants, Teflon, and high-powered military lasers
Fluorine
What is a tiny group of two or more atoms that are bonded tightly together?
Molecule
The shield or cloud formed by fastmoving electrons in an atom that prevents other atoms from moving into the same space
A substance that is composed of more than one type of atom bonded together
Compound
The most widely used halogen; used in bleach, disinfectants, and PVC; an ingredient in table salt
Chlorine
a halogen that is liquid at room temperature; used in photographic film
Noble gases
Tiny particles in an atom that circle the nucleus at tremendous speed
Electrons
A set of electrons in an atom that orbit the nucleus at roughly the same distance
Shell
A strong but lightweight alkali metal used in parts for airplanes and some cars
Magnesium
A noble gas commonly used as filler in incandescent light bulbs; the most plentiful of the noble gases
Argon
What are compounds composed of charged atoms or groups of atoms called?