Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
28 Cards in this Set
- Front
- Back
|
1.1 The Structure of Matter
Atom |
The smallest particle of an element that retains the chemical properties of that element.
|
|
|
1.1 The Structure of Matter
Element |
A substance that can't be broken down or separated into simple substances through a chemical reaction.
|
|
|
1.1 The Structure of Matter
Protons |
Positively charged and situated at the center of the atom.
|
|
|
1.1 The Structure of Matter
Nucleus |
The center of the atom.
|
|
|
1.1 The Structure of Matter
Neutron |
Neutrally charged at situated at the center of the atom.
|
|
|
1.1 The Structure of Matter
Electrons |
Negatively charged and situated outside the nucleus.
|
|
|
1.1 The Structure of Matter
Mass Number (Z) |
The sum of the number of protons and neutrons an atom contains.
|
|
|
1.1 The Structure of Matter
Atomic Weight |
The average atomic mass of an element based on its different isotopes.
|
|
|
1.1 The Structure of Matter
Atomic Mass Unit |
Unit: amu
One atomic mass unit is equal to 1.66054 x 10-24 g. |
|
|
1.1 The Structure of Matter
Isotopes |
Atoms of the same element that have different numbers of neutrons.
|
|
|
1.1 The Structure of Matter
Atomic Number (A) |
The number of protons the atom contains.
|
|
|
1.2 The Structure of Matter
Radioactivity |
The spontaneous disintegration of an unstable atomic nucleus and the subsequent emission of radiation.
|
|
|
1.2 The Structure of Matter
Alpha Decay |
When the nucleus emits an alpha particle.
|
|
|
1.2 The Structure of Matter
Beta Decay |
When the nucleus emits a beta particle.
|
|
|
1.2 The Structure of Matter
Gamma Decay |
The emission of pure electromagnetic energy, no particles are emitted.
|
|
|
1.2 The Structure of Matter
Positron Emmision |
When atoms become more stable by emitting a positron.
|
|
|
1.2 The Structure of Matter
Positron |
A particle with the same size and mass as an electron but with a positive charge.
|
|
|
1.2 The Structure of Matter
Radioactive Series |
When the emission of an alpha or beta particle creates another radioactive species and creates a wave.
|
|
|
1.2 The Structure of Matter
Law of Conservation of Matter |
Mass is neither created nor destroyed
|
|
|
1.2 The Structure of Matter
Fusion |
The reaction when two light nuclei are combined to form a heavier, more stable nucleus.
|
|
|
1.2 The Structure of Matter
Fission |
When a heavy nucleus is split into two nuclei with smaller mass numbers.
|
|
|
1.3 The Structure of Matter
Half-life |
The time it takes for one-half of a sample of isotope to decay.
|
|
|
1.3 The Structure of Matter
Quanta |
A fixed amount that energy is released and absorbed by an atom in.
|
|
|
1.3 The Structure of Matter
Photons |
Discrete energy packets of radiant energy that is also quantized.
|
|
|
1.3 The Structure of Matter
Ground State |
Lowest energy state available for an electron.
|
|
|
1.3 The Structure of Matter
Excited States |
All higher-energy states.
|
|
|
1.3 The Structure of Matter
Uncertainty Principle |
At any one time, it is impossible to calculate the momentum and the location of an electron in an atom.
|
|
|
1.3 The Structure of Matter
Quantum Numbers |
Numbers used to describe the location of electrons.
|
