Chemistry is considered a ______________ science.
Central
Quantitative data deals with
Numbers
State that atoms cannot be subdivided, created or destroyed.
John Dalton
What question was still be asked about electrons at the beginning of the 1900s?
Where are they?
Moseley
The branch of Chemistry pertaining to matter and its relationship to Energy.
List three of the seven base units of the SI system
Mass (g)
Length (m)
Time (s)
Temperature (K)
Amount of Substance (mole)
Current (A)
Luminous Intensity (cd)
This lab device was used to help discover the electron by passing electric current through compressed gas and exposing the beam created to a magnet.
Cathode Ray Tube
If n = 5, how many electrons are present?
50 electrons
The repeating of trends from left to right and top to bottom on the Periodic Table
Periodic Law
Atom, Element, Compound
Convert 25.03 kg into dg.
250,300 dg
How did scientists know to continue the search within the atom to discover the nucleus?
2) The electron did not account for the mass of the atom.
Calculate the frequency of a wave with a wavelength of 698 nm.
v = 4.30 x 1014 Hz
What is the name and group number of the most reactive group of nonmetals on the Periodic Table?
Group 17--the Halogens
The two properties used to differentiate between a solid, liquid and gas
Shape and Volume
A substance has a Density of 2.549 g/cm3 and a mass of 63.0 g. What is the volume of the substance?
V = 24.7 cm3
Calculate the p, n, and e- in Ge-74.
p = 32
n = 42
e- = 32
Explain the process of absorption within an atom.
The ability of an atom to attract electrons is known as
Electronegativity
What is the difference between a mixture and a pure substance? List an example of each.
Mixture--can be physically separated
Pure Substance--Cannot be broken down any further.
Ex: Will Vary
A student conducts an experiment and receives a density of 3.89 g/mL. The known value provided for the density is 4.01 g/mL. What is the students percent error? Is this good data? Explain.
2.99 % Error
Yes, this is good data because it is under 5%
How many atoms are in 4.006 g of Mn?
4.391 x 1022 atoms of Mn
Write the electron configuration for Br and answer the following:
1) Highest Energy Level?
2) Valence e-?
3) Unpaired e-?
1s22s22p63s23p64s23d104p5
1) 4
2) 7
3) 1
For the element P, answer the following:
1) Group
2) Valence
3) Gain/Lose
4) Charge
5) Cation/Anion
6) What happens to the Ionic Radii?
1) 15
2) 5
3) Gain
4) P-3
5) Anion
6) Increases/Gets Larger