History of the Atom!
Nuclear Symbols
Subatomic Particles
Have Atom!
Periodic Table
100

This was the name of the Greek philosopher who first proposed the idea of the atom as being the "indivisible" (atomos)

Who was Democritus?

100

Draw the nuclear symbol for Hydrogen, when it has 0 neutrons.

H11

100
What subatomic particle is positive?

Protons

100

The atom is made primarily of what two areas?

Nucleus and the electron cloud

100

What element is found using the following coordinate? 

Period 5, Group 3

Yttrium, Y

200

This guy, inventing the electron, proposed the Plum Pudding model for the atom.

Who is J. J. Thomson?

200

Draw the nuclear symbol for the element that has a Mass # of 59 and has 28 protons.

59​28 Ni​​​


200

Neutrons, since they have no charge, have the main purpose of giving this to the atom.

What is Mass?

200

This man, in early 1800s, gave us the name for the first concept of the atomic model, which he called the Billiard Ball Model

John Dalton

200

Name three metalloids.

Bonus +500 points if you can name five metalloids.

Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Astatine

300

Niels Bohr came along in the development of the model and proposed that electrons surround the nucleus in fixed _________. 

What are orbits?

300
The mass number represents the sum of what?

Protons and Neutrons

300

When an atom is neutral, the atomic number is equal to what TWO subatomic particle?

Protons and Electrons

300

The Bohr Model, showing electrons circularly fixed surrounding the nucleus, was also known as the _______________ model.

Planetary

300

Group 1 and Group 2 elements go by specific family names. Provide each one, in order. 

(Bonus: Which of the following is more reactive, and why?) 

Alkali Metals (Group 1) and Alkaline Earth Metals (Group 2)

Alkali are more reactive because they only have one valence electron. Because of this, they are anxious to lose it and thus undergo a chemical reaction. 

400

After the Plum Pudding model, Ernest Rutherford was noted for discovering this, using the gold foil experiment.

What is the nucleus?

400

Draw the nuclear symbol for Potassium-39.

3919 K

400

When any two atoms of the same element have  different numbers of neutrons, they are known as...

Isotopes

400

Hyphen notation immediately and directly represents what two pieces of information (not involved in calculations)

Element name and mass number

(For example: Carbon-12 or Nitrogen-14).

400
Explain the concept of shielding, and in your answer, identify which of the following elements would exhibit the most shielding: 

Potassium ; Sulfur ; Iodine ; Hydrogen

Shielding is described as the electrostatic repulsion which exists between inner energy levels of electrons the valence shell, thus weakening its electrostatic attraction to the nucleus. 

Iodine would exhibit the most shielding out of these four elements, since it exists with the most energy levels (5 of them). 

500

Our current conception of the atom is known by this name.

What is the Quantum-Mechanical Model

500

Draw the nuclear symbol for sodium when it has 13 neutrons.

2411 Na

500

When an atom has a # of electrons that differs from its # of protons, it is known as a(n)...

Ion!

500

BONUS for EVERYONE!!

What was the main distinction/advancement between the Bohr Model and our current model of the atom?

(Hint: think electron).

Electrons exist in a cloud, not in neatly fixed orbits as Bohr suggested. This is due to their being both a wave and a particle.

500

3-Part Question:

1) In which city did Dmitri Mendeleev first attend university? 

2) What does the term "halogen" mean?

3) Why did it take so long for Noble Gases to finally be added to the periodic table?

1) St. Petersburg

2) Salt-forming

3) They were inert (unreactive) because they were stable, and so they wouldn't react with anything and thus make their discovery more accessible. 

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