| Question |
Answer |
| nucleus |
the dense, positively charged mass located in the center of an atom |
| Dalton's Theory |
Dalton proposed the theory that all matter is made up of individual particles called atoms, which cannot be divided. |
| Thomson's model of the atom, |
the negative charges were evenly scattered throughout an atom filled with a positively charged mass of matter. The model is called the “plum pudding” model, after a traditional English dessert. |
| Rutherford's model, |
all of an atom's positive charge is concentrated in its nucleus |
| proton |
a positively charged subatomic particle that is found in the nucleus of an atom |
| electron |
a negatively charged subatomic particle that is found in the space outside the nucleus of an atom |
| neutron |
neutral subatomic particle that is found in the nucleus of an atom |
| atomic number |
a unique number for each element that equals the number of protons in an atom of that element |
| mass number |
the sum of the number of protons and neutrons in the nucleus of an atom |
| isotopes |
atoms of a given element that have different numbers of neutrons and different mass numbers |
| energy levels |
the possible energies that electrons in an atom can have |
| electron cloud |
visual model of the most likely locations for the electrons in an atom |
| orbital |
a region of space around the nucleus where an electron is likely to be found |
| electron configuration |
the arrangement of electrons in the orbitals of an atom |
| ground state |
a state in which all the electrons in an atom have the lowest possible energies |
HHS Shrek
