Show:
People in Chemistry
Atoms, Elements, and More People in Chemistry
Atoms
Atoms, Ions, and Atomic Number
Isotopes, Mass Number, and Atoms
100
The person who discovered electrons
Who is J.J. Thompson?
100
Atoms make up this.
What are elements?
100
The center of the atom consisting of protons and neutrons
What is the nucleus?
100
The SI unit used to express the masses of particles in atoms
What is atomic mass units?
100
Atoms that have the same number of protons but have different number of neutrons
What are isotopes?
200
The person who discovered the first fully synthetic plastic
Who is Leo Baekeland?
200
Elements make up this
What are compounds?
200
Particles with no charge
What are neutrons?
200
An unstable atom whose nucleus can change its composition
What is a radioactive atom?
300
The person who found the existence of molecules
Who is Amedeo Avogadro?
300
The first person to theorize the existence of atoms
Who is Democritus?
300
Positively charged particles
What are protons?
300
the normal electrical state of atom
What is neutral?
300
The outermost electrons that determine the chemical behavior of the atom
What is valence?
400
The person who discovered atoms, made atomic weight and the atomic theory
Who is John Dalton?
400
The person who suggested that electrons travel around the nucleus in definite paths
Who is Niels Bohr?
400
particles with negative charges
What are electrons?
400
An atom charged because of a difference between protons and electrons
What is an ion?
400
The sum of protons and neutrons in an atom
What is mass number?
500
The person who discovered the nucleus of an atom
Who is Ernest Rutherford?
500
The two people who explained that electrons travel in electrons clouds, where they are likely to be found.
Who were Erwin Schrodinger and Werner Heisenberg?
500
The smallest particle into which an element can be divided and still be the same substance
what are atoms?
500
The number of protons
What is the atomic number?
500
Description of the mass of a mixture of isotopes
What is atomic mass?