History of the Atom
This scientist proposed the "simple sphere" model, stating that all matter is made of indivisible atoms.
Who was John Dalton?
These two subatomic particles are located inside the nucleus of an atom.
What are protons and neutrons?
Isotopes are atoms of the same element, but have a different number of these particles.
What are neutrons?
The vertical columns on the periodic table are known as these.
What are groups or families?
In the Bohr model, the maximum number of electrons that can fit in the first (innermost) orbital is this.
What is 2?
J.J. Thomson discovered this subatomic particle using a cathode ray tube, leading to his "Plum Pudding" model.
What is the electron?
This subatomic particle carries a negative charge and orbits outside the nucleus.
What is an electron?
This is what remains constant between two isotopes because the number of protons do not change.
What is the atomic number?
These elements, located in Group 18, are famous for being non-reactive because they already have full outer energy levels.
What are the Noble Gases?
Lewis Dot structures only include these that are in the outer energy leve.
What are valence electrons?
Ernest Rutherford discovered the atomic nucleus through this famous experiment, where alpha particles bounced back off foil.
What was the Gold Foil Experiment?
An atom's atomic number tells you the exact number of these charged particles.
What are protons and electrons?
If Carbon-12 has 6 neutrons, this is how many neutrons Carbon-14 has.
What is 8 neutrons?
Most elements on the Periodic Table fall under this category, located to the left of the stair-step line.
What are metals?
The maximum number of dots drawn around an element symbol in a Lewis Dot diagram is this.
What is 8?
This scientist improved the atomic model by proposing that electron travel around the nucleus in fixed orbits or energy levels.
Who was Niels Bohr?
The mass number is the total amount of these two subatomic particles.
What are protons and neutrons?
This is why the atomic mass on the Periodic Table written as a decimal rather than a whole number.
What is because it is an average of all isotopes that naturally occur of that element?
Elements in the same group or family share similar chemical properties because they have the same number of these.
What are valence electrons?
An atom of Carbon has 6 total electrons. In its Bohr model, this is the number of electrons in its second energy level.
What is 4?
This most recent atomic model describes electrons moving unpredictably within high chance regions rather than fixed tracks (bonus points to the team who can give me the ENTIRE name).
What is the Cloud Model or Electron Cloud Model?
In a neutral atom, these two subatomic particles must always be equal.
What are protons and electrons?
If I am a Carbon atom with 6 protons and 8 neutrons, this is my isotope name.
What is Carbon-14?
As you move down the periodic table for metals, this is the trend that occurs.
What is an increase in reactivity?
An element sits in Period 3 and Group 17 on the periodic table. This is how many electron shells and valence electrons it will have in its Bohr model.
What are 3 electron shells and 7 valence electrons?