Composition & Structure
Atoms of elements come together to form
What is "more complex particles"
A diamond is an example of
What is a crystal
A group of two or more atoms held together by chemical bonds
What is a molecule?
Why do scientists use models?
What is:
To quickly depict molecules in a visual way that everyone can see
To make important aspects easier to see
True or False: Two molecules may differ in only one atom, yet have very different characteristics
True
True or false: The atomic level structure of extended structures results in patterns that you can see.
True
The connection between atoms in more complex particles
What is a chemical bond
True or False: Ball and stick and line angle formulas are two types of models scientists use to depict molecules
True
What determines a molecule's atomic composition?
What is "the types of elements and the specific number or ratio of atoms in each element"
If Table salt (NaCl) has a ratio of 1:1, and has 275 sodium (Na) atoms, how many chlorine (Cl) atoms does it have?
275
A substance made up of all the same type of atom
What is an element?
How many unique elements are there?
92
What is chemical structure?
the specific way in which the bonds and atoms are arranged within the molecules of a substance
What is the difference between a crystal and a polymer?
In crystals, the subunit could be atoms or molecules, in polymers, the subunit is always a molecule
In crystals structures go on forever in all three dimensions; in polymers they go on forever in a chain
What is a polymer?
Why do scientists all over the world use the same color to represent specific elements?
By using different colors, scientists can quickly identify the elements in a molecule
How do Butane (C4H10) and Iso-Butane (C4H10) differ?
butane has the four carbons arranged in a chain-like structure, and isobutane has the carbons arranged in a triangle-like shape
What is the difference between a molecule and an extended structure?
A molecule has a discrete end point, while an extended structure can go on forever.
a structure whose subunits occur in a constant ratio and are arranged in a repeating pattern
What is an extended structure?
What is the drawback of using a line angle model to show molecules?
molecules are not flat so it can be hard to depict certain aspects