Elements and Chemical Bonds Flashcards
An outermost electron of an atom that participates in chemical bonding
Valence electron
A model that represents valence electrons in an atom as dots around the element’s chemical symbol
Electron dot diagram
A group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a compound
Chemical formula
A chemical bond formed when two atoms share one or more pairs of valence electrons
Covalent bond
A group of atoms held together by covalent bonding that acts as an independent unit
Molecule
An atom that is no longer electrically neutral because it has list or gained valence electrons
Ion
The attraction between positively and negatively charged ions in an ionic compound
Ionic bond
A bond formed when many metal atoms share their pooled valence electrons
Metallic bond
How can a periodic table be used to fiend the number of valence electrons that are in an atom of an element
The number of valence electrons in an atom equals the ones digit of the group number
Why are some groups such a halogens reactive and why are others such as noble gases nonreactive
Noble gases do not react because they are chemically stable and have paired dots and halogens are reactive because they are chemically unstable and have unpaired dots
What is a space-filling model used for?
To show three-dimensional arrangement of atoms
What is a ball-and-stick Model used for?
To show bond angles
What is a structural formula used for?
Shows atoms and lines
A force that holds two or more atoms together
Chemical bond
A partial positive end and a partial negative end because of unequal sharing of electrons
Polar molecule
