EXAM 2: 05 Molecular Composition Flashcards
What is an atom
The smallest representative particle of an element that can enter into chemical combinations; it retains its identity during chemical reactions
What is a molecule
A chemical combination of two or more atoms in a specific arrangement held together by chemical bonds
What is an allotrope
One of two or more distinct forms of an element in the same phase, differing in (internal) structure
What is a compound
An assembly of atoms of two or more elements
- composed of atoms of different types
What does homonuclear mean
Containing atoms of only one element
Atoms of two atoms of the same element are called
Homonuclear diatomic molecules
What does heteronuclear mean
Containing two or more different elements
What are molecules composed of two different atoms called
Heteronuclear diatomic molecules
What does polyatomic mean
Molecules containing more than 2 atoms
What is an ionic solid
A solid that consists of cations and anions held together by electrostatic attraction of opposite charges (ionic bonds)
- composed of only atomic ions
What are hydrates
Water-containing salts
What are isomers
Same molecular formula, different arrangement of atoms
What is an empirical formula
Smallest relative number of each kind of atom
What is a molecular formula
Specify the number of each type of atom in one molecule
What is formula mass
All the masses of the (in amu) atoms in the empirical formula added together
