S U B S T A N C E S Flashcards
What are the two basic models to demonstrate atomic structure?
Ball and stick Model
Space-filling
What are the two basic configurations atoms take when bonding with other atoms?
Molecules and Crystals
What is a Molecule?
A group of atoms bonded together
What do the space-filling models demonstrate?
How close the center of the atoms are to one another
What is a hydrocarbon?
A molecule composed completely out of hydrogen and carbon
How are crystals formed?
When atoms organize themselves into a repeating grid structure called a crystal lattice
What are ratios?
the relation between two amounts showing the number of times one value contains or is contained within the other.
What are the two basic types of substances?
Pure substances and mixtures
What are the two kinds of pure substances?
Elements and compounds
What are the two types of mixtures?
Homogenous and Heterogenous
What were the four elements?
Fire, air, water, earth
What is the type of term is “element”?
An atomic term
Who created the first periodic table and when
Dmitri Mendeleev in 1869
What are the four parts of a cube on the periodic table
Atomic Number, Chemical symbol, element name, atomic mass
What is the atomic number of an element?
how many protons in the nucleus
