Applications in Chemistry
Unit 1 Review
What is Chemistry?
Answer: the branch of science that deals
with the identification of the substances of
which matter is composed; the investigation
of their properties and the ways in which
they interact, combine, and change; and the
use of these processes to form new
substances
What is Matter?
Answer: Matter has many definitions, but the most
common is that it is any substance which has mass
and occupies space. All physical objects are
composed of matter, in the form of atoms, which
are in turn composed of protons, neutrons, and
electrons.
What is type of matter is
Glucose (C6H12O6)?
Pure Substance OR Mixture
Element OR Compound
Homogeneous OR Heterogeneous
Ionic or Covalent?
NaHCO3 is Baking Soda
Answer: Both Ionic and Covalent
Na is a +1 Cation and HCO3 is a -1 Anion
Metal and Non-metal bond
HCO3 is composed of covalent bonds
How many protons,
neutrons, and electrons?
H=?
Cl = ?
Answer:
H = 1p+, 1e-, and 0 neutrons
Cl = 17p+, 17e-, and 18.5 neutrons
Atoms
Where are protons, neutrons,
and electrons located?
(Drawings are helpful)
Answer:
Protons and neutrons in the nucleus and electrons
in the electron cloud surrounding the nucleus
What is theDensity
Formula?
If you have 5mL of a substance that has a mass of
4.4 grams, calculate the density.
Answer: D = mass/volume
4.4 g / 5 mL = 0.88 g/mL
Why do we use Density?
Answer: Given equal volumes of substances, the
mass of each substance differs, therefore the
density is unique to each substance.
Discuss the amount of energy of
each color in the background of
this slide?
-Compare Infrared light and UV light
Answer: ROYGBIV
Less energy on infrared side and red side of the
electromagnetic spectrum.
More energy on the violet and Ultra Violet side of
the Electromagnetic Spectrum.
Why do objects appear as
different colors to us?
Answer: Emission Spectral lines
“Color/Element Fingerprints”
Compound Naming
Practice
CaCl2
P2F4
CO
NaBr
Al2S3
Ionic or Covalent for each Compound?