Show:
Atoms (Components)
People Who Influenced Atomic Chemistry
Atoms (Types)
Atomic Theory and Bohr Model
People Who
Influenced Atomic Chemistry 2
100
Positively charged particles.
What are protons?
100
Discoverer of oxygen and carbon dioxide
Who is Priestly?
100
When an atom becomes a charged particle due to the difference in number between the protons and electrons
What is an ion?
100
Arrangement of definite shells that Neils Bohr assumed were electrons at a considerable distance form the nucleus
What are quantum levels?
100
Figured there must be protons if there are electrons, discovered that mass is located in the nucleus of an atom, interested in radioactivity, experimented how atoms go through other materials
Who is Rutherford?
200
Particles that make up the nucleus
What are protons and neutrons?
200
English physicist who discovered the electron. He hooked the ends of a glass tube to electrical sources, exposed the stream of rays to an electron magnet, and it bent the stream. He determined that the stream was composed of an electronically charged substance.
Who is Thomson?
200
The number of protons in an atom
What is its atomic number?
200
The last electrons (those which are the outermost or added last to the atom's structure) that determine the chemical behavior of the atom
What valence?
200
American chemist who dealt with valence, looked at outer layers of electrons in atoms, and tested out elements that might emit radiation (like uranium)
Who is Lewis?
300
The normal electrical state of the atoms when negatively charged electrons balance out positively charged protons
What is neutral?
300
Kekule established a simple formula to represent how chemicals bonded based on his experience with this type of carbon atom
What is a benzene ring including six carbon atoms (each with a hydrogen atom)?
300
Atoms that have the same number of protons but have different numbers of neutrons, atoms of the same element that differ in weight
What are isotopes?
300
A Greek philosopher who (in 440 BC) proposed that if you cut a silver coin in half again and again, then eventually you would end up with an "uncuttable" particle made of a single material that is always moving called an atom
Who was Democritus?
300
These two people who used the first spectrascope and discovered that there is sodium in the sun
Who are Bunsen and Kirchoff?
400
Two types of particles that are identical to particles of their own type
What are protons and neutrons?
400
Developed first modern atomic theory
Who is Dalton?
400
Radioactive atom
What is an unstable atom whose nucleus can change its composition?
400
Greek philosopher who came after Democritus. He disagreed with Democritus's ideas and believed that you would never end up with an indivisible particle. He influenced others so they believed his ideas.
Who was Aristotle?
400
He created world's first synthetic plastic that can mimic or surpass natural fibers in strength
Who is Baekeland?
500
It would take 50,000 atoms of this element to equal the thickness of a sheet of this
What is aluminum?
500
He predicted the properties of atoms and created the periodic table that we use today.
Who is Mendeleev?
500
The sum of the protons and neutrons in an atom
What is mass number?
500
1. All substances are made of atoms. Atoms are small particles that cannot be created, divided, or destroyed. 2. Atoms of the same element are exactly alike, and atoms of different elements are different. 3. Atoms join with other atoms to make new substances.
What is John Dalton's atomic theory?
500
This person isolated two new radioactive elements (radium, pallodium). She died of lukemia from radioactivity. This taught us about the benefits and dangers of radiation.
Who is Marie Curie?