Science test vocab
vocab for the science test on tuesday
Terms in this set (26)
mixture made of 2 or elements that have properties of a metal. at least one element is a metal.
A force that holds together the atoms in a substance. The bond is not a physical link, it is the result of attractive forces.
Shorthand method used by scientist to describe a compound. It tells what elements are contained in the compound and the ratio of the atoms of those elements.
An atom with a full outer energy level.
a substance in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating three-dimensional pattern.
In a chemical formula a number written after and below a symbol that tells how many atoms of that element are in a unit of a compound.
The tendency of an atom to attract a pair of electrons in a bond.
Outer energy shell electrons that determine the way in which the atom can bond with other atoms. They are the electrons held most loosely by the nucleus.
Positive or negative number assigned to an element to show its combining ability based on its valence electrons. It indicates how many electrons an atom will gain, lose or share to be stable
an atom that has lost or gained electrons that results in an overall charge to the atom.
when an atom loses an electron, it lies a negative charge and becomes a...
when an atom loses an electron, it lies a positive charge and becomes a...
bonds resulting from electron transfer between 2 atoms that differ greatly in electronegativity. opposites attract. usually formed by bonding a metal to a nonmetal.
bonds resulting from the sharing of a pair of electrons between 2 atoms that are close in electronegativity. neutral particles are formed by sharing electrons. bonds are between 2 nonmetal usually
neutral group of atoms joined by covalent bonds.
A bond formed when two atoms share a pair of electrons
A covalent bond in which two pairs of electrons are shared between two atoms
A chemical bond formed when atoms share three pairs of electrons
When one atom has a stronger attraction for electron that the other atom in a molecule, it douses a slight charge at each end.
Atoms that share electrons equally.
Covalently bonded group of atoms that act as one with an overall positive or negative charge. Compounds contain 2 or more elements.
Attraction between a metal ion and the electrons surrounding it. "sea of electrons"
capable of being shaped or bent or drawn out.
able to be hammered or pressed permanently out of shape without breaking or cracking.
chemical mass unit, molecules, atoms, or some other unit.
6.02 X 10 to the 23rd power