Periodic table
Three types of elements
These are the metals, non-metals, metalloids or noble gases.
The mass of 2 moles of H2S ?
What is 68 grams
She was a pioneered scientist in radioactivity and won two Nobel prizes.
Marie Curie.
The noble gases fall under this category of elements.
What are the most stable elements?
These subatomic particles make up the mass of an atom.
What are protons, neutrons?
When 80 grams of aluminum is reacted with excess chlorine gas, how many formula units of AlCl3 are produced?
What is 2.96 moles AlCl3
2Al+3Cl2 2AlCl3
80/27=2.96 mole Al
molAl=mol Alcl3
Serbian-American inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to the design of the modern alternating current (AC) electricity supply system.
Who was Nikola Tesla?
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
What is an ion?
These are the evidence for a chemical change having occurred.
What are change in color, the production of a gas, and the formation of a precipitate?
Born February 11, 1847, Milan, Ohio, U.S.—died October 18, 1931, West Orange, New Jersey), American inventor who, singly or jointly, held a world-record 1,093 patents. In addition, he created the world’s first industrial research laboratory, the incandescent lamp.
Who was Thomas Edison?
This is the amount of protons in an atom of Oxygen.
What is 8?
This is a model, system consisting of a small, dense nucleus surrounded by orbiting electrons—similar to the structure of the Solar System, but with attraction provided by electrostatic forces in place of gravity.
What is the Bohr Model?
Each of the actual or potential patterns of electron density that may be formed in an atom or molecule by one or more electrons, and that can be represented as a wave function.
What are orbitals?
The product of this reaction is CO2 and H2O.
What are the products of a combustion?
In 1848, this British mathematician and scientist proposed an absolute temperature scale, which was independent of the properties of a substance like ice or the human body.
Who was Kelvin?
This is the number of neutrons in an atom of Nickel.
What is 31?
59-28=31
number of neutrons= mass-number of protons
An atom with 8 protons, 8 neutrons, and 8 electrons is an atom of this element.
What is Oxygen (O)
an ordered array of points describing the arrangement of particles that form a crystal.
What is a lattice?
Consider the following balanced equation: 4NH3 + 5O2 = 4NO + 6H2O How many grams of O2 (formula wt = 32.0) are required for the complete reaction of 162 g of NH3 (formula wt = 17.0)?
What is 381
(162/17)*5/4
*32=
English physicist and chemist whose many experiments contributed greatly to the understanding of electromagnetism. He invented the rubber balloon while experimenting with gases.
Who is Faraday?
A Faraday cage or Faraday shield is an enclosure used to block electromagnetic fields. A Faraday shield may be formed by a continuous covering of conductive