The atomic number tells us the... 1. Number of neutrons. 2. Atomic Mass. 3. Number of protons. 20% 20% 20% 20% 20% 4. Charge on an atom. 5. The Isotope. Atomic Mass. The Isotope. Number of neut... Number of prot... Charge on an a... The atomic mass is the… 1. Number of protons. 2. Number of neutrons. 3. Number of electrons. 4. Number of protons 20% 20% 20% 20% 20% and neutrons. 5. Number of neutrons and electrons. Number of prot... Number of neut... Number of elec... Number of prot... Number of neut... Isotopes have different numbers of… 1. Protons 2. Neutrons 3. Electrons 33% 33% 33% Protons Neutrons Electrons Isotopes have the same numbers of… 1. Protons 2. Neutrons 3. Electrons 33% 33% 33% Protons Neutrons Electrons 29 is the… 29 14Si 1. Number of protons. 2. Atomic Mass 3. Number of Neutrons 20% 20% 20% 20% 20% 4. Atomic Number 5. Number of Protons Atomic Mass Atomic Number and Neutrons. Number of prot... Number of Neut... Number of Prot... How many protons does the atoms of this element contain? 29 14Si 1. 29 2. 14 3. 15 20% 20% 20% 20% 20% 4. 43 5. Cannot tell. 29 14 15 43 Cannot tell. Is this the most common isotope of Silicon? 29 14Si 1. Yes 2. No 3. Cannot tell. 33% 33% 33% Yes No Cannot tell. He discovered the electron? 1. Dalton 2. Bohr 3. Rutherford 25% 25% 25% 25% 4. Thomson Bohr Dalton Thomson Rutherford From his gold foil experiment he theorized that the atom is made up mostly of empty space. 1. Dalton 2. Bohr 3. Rutherford 25% 25% 25% 25% 4. Thomson Bohr Dalton Thomson Rutherford If an atoms electrons move from a low energy level to a high energy level the atom must ___________ energy. 1. Absorb (take in) 2. Emit (give of) 50% 50% Emit (give of) Absorb (take i... Light of the following wavelength (color) has the highest energy: 1. Red 2. Yellow 3. Green 20% 20% 20% 20% 20% 4. Blue 5. Violet Red Blue Yellow Green Violet If the Lithium atom below has a charge of +1, how many electrons does this atom have? 7 3 Li 1. 1 2. 2 3. 3 20% 20% 20% 20% 20% 4. 4 5. 5 1 2 3 4 5 If the Oxygen atom below has a charge of -2, how many electrons does this atom have? 16 8 O 1. 5 2. 6 3. 7 17% 17% 17% 17% 17% 17% 4. 8 5. 10 5 6 7 8 6. 11 10 11 Light of the following wavelength (color) has the lowest energy: 1. Red 2. Yellow 3. Green 20% 20% 20% 20% 20% 4. Blue 5. Violet Red Blue Yellow Green Violet What 2 forces are the main forces involved in holding the atom together: 1. Gravity and weak nuclear. 2. Gravity and strong nuclear. 3. Weak nuclear and strong nuclear. 4. Weak nuclear and 17% 17% 17% 17% 17% 17% electromagnetic. 5. Strong nuclear and electromagnetic. 6. Electromagnetic and gravity. Gravity and weak nuclear. Strong nuclear and elec... Gravity and Weak strong nuclear nuclear. Weak and nuclear stron... and elect... Electromagnetic and grav....