This document provides information about the parts of an atom including the location, charge, and particles. It lists many of the scientists who contributed to our understanding of atoms such as Democritus, Dalton, Thomson, Rutherford, and Bohr. The document also categorizes different types of elements into groups based on their properties including alkali metals, alkaline earth metals, transition metals, non-metals, halogens, metalloids and noble gases.

1. Parts of the Atom
Label the parts of the atom.
A
2nd 6 weeks Study Guide Answers
B
C
Contribution
Year Scientist
Gave us the def. of
400 BC Democritus an atom.
Particle Neutron Billiard Ball Theory
1803 Dalton
Plum Pudding Model
Location Nucleus 1897 Thomson (Electrons)
Gold Foil (positive
1911 Rutherford
Charge Negative Nucleus)
Modern model of
1913 Bohr the atom, small
nucleus that is
positively charged
with a negative
cloud of electrons
orbiting it.
Group Examples Reactivity Valence
electrons
List and explain the steps of the scientific
Alkaline Li, Sr, VERY Reactive 1 method
Metals
Alkaline Earth Mg, Ca Not as reactive as 2
Metals group 1, but still
reactive.
Transition Hg, Ag, Au Reactivity Varies, Varies
Metals but not as reactive
as groups 1 and 2
Non-Metals C, N, O, H, Some are reactive, Varies
others aren’t
Halogens Cl, Br, I Very Reactive. As 7
reactive as group 1
Metalloids B, Si Reactivity varies 3-5
with conditions
Noble gases He, Ne, Ar Not reactive at all! 8

2. •Write out the formula for density and complete the following
•A student finds a rock on the way to
calculations: SHOW ALL WORK. school. In the laboratory he determines that
•Calculate the density of a material that has a mass of 52.457 g the volume of the rock is 22.7 cm3, and the
and a volume of 13.5 cm3. mass in 39.943 g. What is the density of
the rock?
•The density of silver is 10.49 g/cm3. If a sample of •How many grams of tin would occupy 5.5 L, if it
pure silver has a volume of 12.993 cm3, what would has a density of 7.265 g/cm3?
the mass?
A car is driving 70 mph down the
Pure gold has a density of 19.32 g/cm3. How large
would a piece of gold be if it had a mass of 318.97 g?
highway. How many m/s is this?
There are 1.6 km in a mile.

3. 3.650g =_________kg 450000000mL=________kL
Describe the differences and
1.3x107 cm=_________m similarities between physical and
chemical properties.
How did Dmitri Mendeleev organize
his periodic table?
• Glass Breaking
• Ice Melting
• Burning Wood
• Air Freshener Evaporating

4. How did Henry Mosely organize his What is the difference between a
periodic Table? period and a group?
How do you calculate the number of How many electrons, neutrons and
neutrons in an atom? protons are in the following elements?
Element Protons Neutrons Electrons
Oxygen
Nitrogen
Argon
Lithium
Boron
Ms. Milsaps Demo Day
• Types of reactions