| A | B |
|---|
| Which scientist bombarded gold foil and found that the atom was mostly empty space? | Ernest Rutherford |
| Which scientist discovered the electron? | JJ Thomson |
| Which scientist is responsible for the modern atomic theory? | John Dalton |
| What particles make up the atom? | protons, neutrons, & electrons |
| Where are the protons & the neutrons found? | in the nucleus |
| Where are the electrons found? | in the energy levels (the space around the nucleus) |
| If an isotope of Boron has a mass number of 11, how many protons & neutrons are found in the nucleus? | 11 - (5 protons, 6 electrons) |
| ________ electrons are found in the outermost shell. | valence |
| They may be _______ or _______ by an atom when bonding occurs with another atom. | gained or lost |
| Electrons are found in various _______ levels. | energy |
| With which family will alkali metals (+1 ions) most likely bond? | halogens (-1 ions) |
| If an atom will bond with an element, it will bond the SAME WAY with any other element in that same _______. | family |
| What is the oxidation number for elements in the oxygen family? | -2 |
| What is the oxidation number for elements in the alkaline earth family? | +2 |
| How many valence electrons would an atom of Beryllium have? | 2 |
| How many valence electrons would an atom of Krypton have? | 8 |
| What is the atomic number for Carbon? | 6 |
| What is the atomic number for Calcium? | 20 |
| What is the mass number if the atomic mass is 35.65? | 36 |
| What is the mass number if the atomic mass is 27.1? | 27 |
| atoms of element with different numbers of neutrons: | isotope |
| holds neutrons and protons together in the nucleus: | strong nuclear force |
| Rutherford disovered that this was mostly made up of empty space: | atom |
| a substance of 2 or more elements that can't be separated by physical means: | compound |
| substance that contains only one kind of matter: | element |
| smallest particle of a compound that retains properties of a compound: | molecule |
| location of electrons around the nucleus of an atom: | energy levels |
| found in the outermost shell; involved in chemical reactions: | valence electrons |
| number of electrons lost, gained, or shared when bonding occurs: | oxidation number |
| atoms that are positively or negatively charged; ones that have hained or lost electrons: | ion |
| particle with a positive charge found in the nucleus: | proton |
| the rule that says atoms need eight electrons to be stable: | octet rule |
| bond formed when electrons are shared: | covalent bond |
| bond formed when electrons are lost or gained: | ionic bond |
| number of protons and neutrons in nucleus | Mass Number |
| negatively charged particle found outside the nucleus | electron |
| anything that has mass and takes up space | matter |
| Number of protons of an element | Atomic Number |
| average mass of all known isotopes of an element | Atomic Mass |
| Atom that has gained or lost electrons | Ions |
