Atomic Mass & Atomic Theory History
Who stated that there were 4 elements (Fire, Water, Earth, Air)?
Who is Aristotle?
A covalent bond occurs between 2 ____
What is nonmetals?
How can you know how many valence electrons are in an element?
The group number on the periodic table.
what shapes are atoms?
Spheres
What does this symbol mean?
λ
wavelength
Who gets credit for the first idea of atomic theory/mass?
Who is John Dalton?
Is the following bond Covalent or Ionic: Magnesium Bromide
What is Ionic?
How many valence electrons does Neon have?
8
Who stated that atoms are indivisible and the smallest unit of matter?
John Dalton
What happens as an electron jumps from a higher energy level to a lower energy level?
It releases energy in the form of light/photons.
What was stated in John Dalton's atomic theory?
All matter is made up of atoms, all atoms of a given element, and compounds are combinations of two or more different types of atoms.
When does a compound name need Roman numerals?
What is...
When the compound has a transition metal or includes lead, tin, or bismuth
Give the abbreviated electron configuration for cadmium.
[Kr]4d105s2
An atom of sulfur (S) has 16 protons and 18 electrons. What is the charge of this ion?
-2
What color has the highest frequency?
Violet
Who discovered the electron, and how?
J.J. Thomson, using the cathode ray tube experiment.
Give the name for the following formula: Mn(SO₄)₂
What is Manganese (IV) Sulfate?
Give the full electron configuration for gallium.
1s22s22p63s23p63d104s24p1
How were protons discovered?
Ernest Rutherford discovered them through his gold foil experiment.
What is the formula for calculating wavelength of a light wave?
λ=c/f
What does the Pauli Exclusion Principle state about electrons?
No two electrons in an atom can have the same set of quantum numbers.
Give the formula for the following compound: Calcium Phosphate
What is Ca3(PO4)2 ?
What is the role of quantum numbers in describing the arrangement of electrons in an atom?
They can describe an electron's energy, shape, and spin.
An atom of sodium (Na) loses one electron. What is the charge on the resulting ion, and what is its name?
Na⁺, and it has a +1 charge.
Calculate the frequency of a light wave with a wavelength of 500 nm.
6.00×1014 Hz.