The Periodic Table
True or false: All elements in the 1st group have 1 valence electron and are in the alkali metal series
True or false: All elements in the 18th group have a full valence shell, are noble gases, and have 8 electrons in their valence shell
True or false: All elements in the periodic table have protons, neutrons, and electrons
False
False
False
Proper scientific notation includes:
a) including the charge (if applicable) in the bottom right, the symbol, the atomic number in the top left, mass number in the bottom left
b) including the charge (if applicable) in the bottom right, the symbol, the atomic number in the top left, atomic mass in the bottom left
c) including the charge in the top right, the symbol, the atomic mass in the top left, atomic number in the bottom left
d) including the charge (if applicable) in the top right, the symbol, the mass number in the top left, atomic number in the bottom left
d
When Sulfur and Indium are bonded together, how much of each element must be present?
What is the chemical formula?
What is the chemical name?
2 Indium atoms and 3 Sulfur atoms
In2S3
Indium Sulfide
Proton: Determines the element that the atom will be (on the periodic table)
Neutron: Holds the nucleus together (stability)
Electron: Determines the reactivity of an atom
Is turning on a flashlight a chemical or physical change
Chemical
How many valence electrons does the element on the 5th period and 14th group?
4
is air a mixture or solution?
mixture
How many and which elements are present in this formula? How many atoms of each element are present in this formula? How many atoms are present in total?
(C4IB7)5K3He6
5 elements
Carbon: 20
Iodine: 5
Boron: 35
Potassium: 3
Helium: 6
Total: 69
How many electrons can each of the following energy levels hold?
1st energy level:
2nd energy level:
3rd energy level:
4th energy level:
5th energy level:
2
8
8
8
8
what is the difference between atomic mass and mass number
atomic mass: the average mass of all isotopes of an atom of an element based on the abundance of all the isotopes in nature
Mass number: the number of protons plus the number of neutrons
True or false: Reactivity increases as you go down a group in the periodic table.
True or false: Elements in the same group are more chemically similar
True or false: There are 5 series present within the first 20 elements in the periodic table
True or false: Metalloids are more chemically similar to metals that non-metals
True or false: All substances on the left side of the periodic table prefer to become cations
True
True
False
False
False
What is the most correct way to indicate the lewis dot structure of Bromide
https://docs.google.com/drawings/d/141Z8aJO1-dSnXWeG_S0ev6lcHl92akAyYM-_HyvsOGM/edit?usp=sharing
d)
Symbol, 8 dots around the symbol, square brackets around the symbol, - charge sign (without a 1)
True or False: All metals prefer to lose electrons
False
If an atom has an unfilled valence orbit, it can _____ electrons in order to achieve a _____ electron arrangement.
Gain or lose electrons
“noble gas (full octet)”
Is glucose an ionic or molecular compound? Why?
What is another name for a molecular compound?
Ionic compound: Metal + nonmetal
Molecular (covalent) compound: nonmetal + nonmetal
Explain why hydrogen is in the first group even though it is a reactive nonmetal.
Why is it not in the same area as the rest of the reactive nonmetals?
Hydrogen is in the first group as elements in the same group have the same number of valence electrons and share similar chemical properties. Even though hydrogen is classified as a reactive nonmetal, it is not in the same area as the rest of the reactive nonmetals because of its reactivity tendencies
How many rays of light were produced when Bohr electrocuted Hydrogen, an atom with only one electron, in his experiment?
4
True or False: All nonmetals, besides carbon, prefer to gain electrons
False
What is the most abundant isotope of sodium?
Is said isotope stable (in terms of protons and neutrons)?
Is said isotope stable (in terms of charge)?
Sodium-23
Yes
No
Define 5 properties of metals.
How do nonmetals differ from metals?
How do metalloids differ from metals and nonmetals?
Metals:
- Are malleable or ductile
- Good conductor of heat and electricity
- Relatively high melting and boiling point
- Usually brittle
- Usually a solid
- Relatively high density
- Usually prefer to lose electron
- Non-Brittle
Nonmetals usually lack the characteristic that metals have
Metalloids have properties of both metals and nonmetals
Solve the table and name all the ion versions of these elements
https://docs.google.com/document/d/1I6nfeVDo8qr6PDPn90xq6ITjm3RZnQb9cOs_-cmtmVY/edit?usp=sharing
Antimonide
Chloride
Telluride
Hydrogen or Hydride
Rubidium
Name the 6 main discoveries made in the history of an atom, when they occurred, the model made by each scientist, the experiment they did (if applicable), and what scientist the discovery is attributed to?
John Dalton (1807/early 1800’s):
- Made the Billiard Ball Model
- Proposed the particle theory of matter
J.J. Thomson (1897):
- Cathode Ray experiment
- Created the Raisin Bun/Plum Pudding Model
- Stated that electrons are scattered over a bed of positively charged matter
Ernest Rutherford (1907)
- Did the gold foil experiment
- Created the planetary/nuclear model
- In the atom, there is a positively charged space located in the center of the atom known as the nucleus
Niels Bhor (1912/1913/1910’s)
- Did the electric hydrogen experiment
- Created the Bohr Model
- Electrons exist on energy levels
James Chadwick (1932)
- Created the Bohr-Rutherford Model
- Discovered Neutrons
Which group(s) has/have the most reactive elements?
Which period(s) has/have the most reactive elements?
groups 1 and 17
N/A
Which elements have a 100% abundance in nature?
What is the name of the rule that states that atoms prefer to have 8 valence electrons in their outermost energy level?
Does said rule apply to all elements?
Octet Rule
No, Helium is the exception