Question | Answer |
What is the symbol used for proton? | P+ |
What is the charge of a proton? | 1+ |
What is the relative mass of a proton? | 1 AMU |
Where in atoms are protons found? | Nucleus |
What is the symbol for neutron? | N |
What is the relative mass of a neutron? | 1 AMU |
What is the charge of a neutron? | 0 |
Where in atoms are neutrons found? | Nucleus |
What is the symbol used for electrons? | E- |
What is the charge of an electron? | 1- |
What is the relative mass of an electron? | 1/1836 AMU |
Where in atoms are electrons found? | Electron cloud |
Who predicted that there were four elements: earth, air, fire, and water? | Aristotle |
Who concluded that all atoms of the same element have the same mass? | Dalton |
What subatomic particle did JJ Thomson discover? | Electron |
Are higher energy levels in excited states or ground states? | Excited states |
What is the nickname for Dalton's model of the atom? | Billiard ball model |
What are the three points of Dalton's theory? | 1: all elements are made of atoms 2: all atoms of the same element have the same mass 3: compounds contain atoms of more than one element that always combine the same way |
Who found/discovered the nucleus? | Rutherford |
In an atom with a nucleus, where is all the positive charge? | Nucleus |
What subatomic particle has a negative charge? | Electron |
What is the atomic number? | # of protons and # of electrons |
How do you find the number of neutrons in an atom? | Neutrons = atomic mass - # of protons |
Whats causes an electron to move to a higher energy level ? | Absorbing/adding energy |
What does Neil Bohr's model look like? | Draw or see #25 on study guide |
What does the electron cloud model describe? | Possible locations of electrons around nucleus |
What is the difference between the ground state and the excited state? | Ground state: lowest possible energy, most stable
Excited state: occurs when atom absorbs enough energy to cause 1 or more electrons to move to an orbital with a higher energy |