Atoms
Where protons located?
In the nucleus of an atom.
What is a Group/Family?
Elements in the same column
Magnesium Atomic #
12
How many valence electrons does calcium have?
5
Who is given Credit for the creation of the periodic table?
Dimitri Mendeleev
Where are electrons located?
Electrons are located in: Electron Cloud, Outter Shell.
What do elements in the same group/family have in common?
They have the same # of valence electrons.
Bromine Atomic Mass #
80
What is a Metalloid?
An element that has a properties of both of non metals and metals.
What Charge does Neutrons have?
No charge they are neutral.
What exist inside of the Nucleus?
Protons, Neutrons
What is a Period?
Elements in the same row.
Helium Atomic #
2
Name the Groups of the Periodic table?
Halogens, Alkaline Earth metals, Alkali metals, Noble gases, Transition metals, Rare earth metals.
What did JJ Thompson relate his model of the atom to?
Plum Pudding
What overall charge does and unreacted atom have? And Why?
The overall charge is neutral b/c it has the same number of protons(+) and electrons(-) canceling each other out.
What do elements in the same period have in common?
The same number of energy levels.
Aluminum Atomic #
13
What kind of charge does electron have?
Negative
What famous experiment did Rutherford use to discover the nucleus of the atom?
The Gold foil experiment
Describe the size of a proton, neutron and electron?
Protons and Neutrons are approximately the same size, while electrons are small and don't contribute to the mass of an atom.
What is the name of this Element: Ar?
Argon
Zinc Atomic #
30
What is a Valence Electron?
The number of electrons in the outer most energy levels of an atom.
Who was the first to say that the atom was the smallest indivisible unit of matter and was like a small, dense ball?
Democritus