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Electrons: sub-atomic particles with a negative charge
Molecules: a collection of two or more atoms held together by chemical bonds
Neutrons: uncharged sub-atomic particles
Protons: sub-atomic particles with a positive charge
Atom: electrons surrounding a nucleus that contains protons and neutrons
Democritus: Proposed the existence of an atom
Law of Definite Proportions: elements composing a compound are always present in the same proportions
Law of Multiple Proportions: when two elements can combine to form more than one compound
Rutherford: named the proton and nucleus
Dalton: proposed that atoms are indivisible and building blocks of matter
Aristotle: rejected the idea of the atom
Isotope: one of two or more atoms that have the same atomic number, but different mass numbers
Mass Number: the sum of the number of neutrons and protons in an atomic nucleus
Orbital: the wave function of an electron in an atom or molecule
Hunds Rule: if two or more orbitals of equal energy are available, electrons will occupy them singly before filling them in pairs
Pauli Exclusion Principle: no two electrons may occupy the same quantum state
Aufbau Principle: used to determine the electron configuration of an atom, molecule, or iron.
Across:3. | when two elements can combine to form more than one compound | 5. | if two or more orbitals of equal energy are available, electrons will occupy them singly before filling them in pairs | 8. | uncharged sub-atomic particles | 10. | electrons surrounding a nucleus that contains protons and neutrons |
| 12. | one of two or more atoms that have the same atomic number, but different mass numbers | 13. | the sum of the number of neutrons and protons in an atomic nucleus | 15. | named the proton and nucleus | 16. | sub-atomic particles with a negative charge |
| | Down:1. | a collection of two or more atoms held together by chemical bonds | 2. | Proposed the existence of an atom | 4. | elements composing a compound are always present in the same proportions | 6. | proposed that atoms are indivisible and building blocks of matter |
| 7. | sub-atomic particles with a positive charge | 9. | the wave function of an electron in an atom or molecule | 11. | used to determine the electron configuration of an atom, molecule, or iron. | 14. | rejected the idea of the atom |
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PuzzleFast.com, Noncommercial Use Only
Across:3. | when two elements can combine to form more than one compound | 5. | if two or more orbitals of equal energy are available, electrons will occupy them singly before filling them in pairs | 8. | uncharged sub-atomic particles | 10. | electrons surrounding a nucleus that contains protons and neutrons |
| 12. | one of two or more atoms that have the same atomic number, but different mass numbers | 13. | the sum of the number of neutrons and protons in an atomic nucleus | 15. | named the proton and nucleus | 16. | sub-atomic particles with a negative charge |
| | Down:1. | a collection of two or more atoms held together by chemical bonds | 2. | Proposed the existence of an atom | 4. | elements composing a compound are always present in the same proportions | 6. | proposed that atoms are indivisible and building blocks of matter |
| 7. | sub-atomic particles with a positive charge | 9. | the wave function of an electron in an atom or molecule | 11. | used to determine the electron configuration of an atom, molecule, or iron. | 14. | rejected the idea of the atom |
| |
© 2016
PuzzleFast.com, Noncommercial Use Only