| Question | Answer |
|---|---|
| The smallest piece of matter that still retains the properties of the element | Atom |
| Number on the periodic table that represents the number of protons in an atom | Atomic Number |
| Number on the periodic table that is the weighted average mass of the mixture of isotopes that exists naturally for an element | Average Atomic Mass |
| Showed through light spectroscopy that electrons existed in specific energy levels in 1913 | Bohr |
| Father of modern atomic theory – showed with experiments in 1800 that all elements had atoms as their smallest particles | Dalton |
| Ancient Greek who first said all matter was made of small indivisible particles called “atomos” | Democritus |
| Region outside of the nucleus where the electrons are found | Electron Cloud |
| Current atomic model with electrons not as particles in orbits, but wave-particles in areas of probability | Electron Cloud Model |
| Negatively charged particles in an atom | Electrons |
| Atoms of the same element that have different numbers of neutrons | Isotopes |
| The sum of the number of protons plus neutrons in the nucleus | Mass Number |
| Neutral particles in the nucleus of an atom | Neutrons |
| The center of the atom containing protons and neutrons | Nucleus |
| Positively charged particles in an atom | Protons |
| Smallest known particle that makes up protons and neutrons | Quarks |
| Discovered the positive nucleus at the center of atoms with gold foil experiment in 1911 | Rutherford |
| Discovered electrons with cathode ray tube experiments in 1904 | Thompson |
| Each energy level of an atom can hold a maximum number of what? | electrons |
| The filling order for electrons in a Bohr diagram is | 2,8,18,32 |
| What do the dots in a Lewis Electron Dot diagrams represent? | electrons in the outer level or valence electrons |
| What does the chemical symbol represent? | the name of an element |
| The mass number of any element equals what? | The protons + the neutrons |
| Where is the atomic number found? | At the top of the element box |
| Why do different metals produce different colors when burned? | Electrons are “excited” by added energy, and jump to another energy level. When they “fall back,” they release energy as light. The amount released determines the color seen. |
| How do you indicate a specific isotope of an element? | By adding the mass number of that isotope (example: H-1, C-14) |
| How do we show protons, neutrons and electrons on a Bohr diagram? | proton – p+; neutron – n; electron – e-; protons and neutrons in nucleus, electrons in energy levels |
| He discovered the neutron. | James Chadwick |
| He believed that all matter was made up of earth, air, fire, and/or water. | Aristotle |
| In an experiment, it is the variable that is being tested or manipulated. | Independent variable |
| Calculate the mass number of a element with 6 protons, 6 electrons, and 6 neutrons. | 12 Sum of protons and neutrons |
| Diagram or model showing an element symbol and dots representing the outermost electrons only. | Lewis structure or diagram |
| Diagram showing particles in the nucleus and all electrons in their energy levels. | Bohr model |
| How many electrons may reside in energy level 1 if it is full? | 2 |
| How many electrons may reside in energy level 2 if it is full? | 8 |
| How many electrons may reside in energy level 3 if it is full? | 18 |
| How many electrons may reside in energy level 4 if it is full? | 32 |