Physical Science Chapter 16
Terms in this set (41)
The smallest unit of matter that keeps the same properties as matter.
Proton, Neutron, Electron
The 3 subatomic particles of an atom are called ______________, _______________, and ________________.
Made up of all the protons and neutrons in an atom.
Made up of all the electrons that surround the nucleus of an atom.
Small particles that make up protons and neutrons.
Protons and neutrons are both made up of ___ quarks.
Anything that has mass and volume.
Thought that the atom was indivisible.
Democritus's model of the atom
Thought that all matter is made up of 4 elements that can continuously be divided.
Earth, water, air, fire
Aristotle thought the 4 elements were ________, _____________, _______ and _________.
Did not have one because he did not believe in them
Aristotle's model of the atom
Presented evidence that atoms did exist by studying water vapor.
Indivisible, size, properties, weights, properties, combine, compounds, created, destroyed
Dalton's Atomic Theory
1. Matter is made up of atoms that are _______________
2. All atoms of the same element are the same _______ and have the same ____________
3. Atoms of different elements have different ____________ and ______________
4. Atoms of different elements __________ to form ______________
5. Atoms cannot be ________________ or _________________, they can only be separated, combined, or rearranged in chemical reactions
Discovered the electron.
JJ Thomson used the Cathode Ray Tube Experiment and found that the beam of light was ________________ using a magnet.
JJ Thomson's model of the atom
Discovered the nucleus.
Gold foil, alpha particles, bounced back
Ernest Rutherford performed the ________ _________ experiment where he put _________ ______________ through gold foil and some of them ____________ ________, so he knew the nucleus was positive because the particles were positive too.
Big Bang Theory
Rutherford's model of the atom
Found that electrons orbit the nucleus.
Electrons that are the _____________ from the nucleus have the __________ energy.
A specific path that an object takes around another object.
Discovered the neutron and its mass.
James Chadwick, beryllium
_________ ________________ shot alpha particles through a sheet of ______________ to find the neutron.
Modern Atomic Theory
It is impossible to know the exact location of electrons, but they are found in the orbital and we can predict where they are based on the amount of energy they have.
3D region around the nucleus where electrons can be located.
1860, 60, atomic masses
By __________, there were _____ known elements and different __________ ___________ were used for them all around the world.
Found a method to accurately measure relative atomic mass and make it the same all around the world.
Wrote his own chemistry textbook and created the periodic table of elements
Electrons found in the outermost energy level that can be lost, gained, or shared during chemical bonding.
Atoms of the same element with different mass numbers.
Total of the protons and neutrons in the nucleus of an atom.
Hyphen Notation, Nuclear Symbol
Ways to Name an Isotope
Total number of protons in an atom.
A charged particle.
A negatively charged particle.
A positively charged particle.
Changed the periodic table and arranged it by increasing order of atomic number.
Physical and chemical properties of elements are functions of their atomic numbers.
Up, down, top, bottom
Name 4 quarks.