| Question | Answer |
| Who provided a basis for ordering the periodic table according to the atomic number? | HenryMosely
|
Who was the first scientist to come up with the atomic theory? | John Dalton
| What is used to calculate the average atomic mass of an element? | Isotopes
| What is the mass number of an oxygen atom that has 8 protons and 9 neutrons? | 17
| What group of elements are considered to be unreactive? | noble gases
| How many valence electrons does group 1 contain? | 1
| If the protons increase across the periodic table, what happens to the electrons? | they increase
| As the wavelength of a wave increases, what would happen to the frequency? | decrease
| How many neutrons does carbon contain? | 6
| What is an isotope? | atoms of the same element that have different mass numbers
| What experiment was Rutherford credited with? | gold foil experiment
| Who was the scientist who had a model of fixed orbitals for electrons? | bohr
| Elements in the same groups have similar physical and properties? | chemical
| What is the name for an element in group 1? | alkali metal
| What happens to the atomic radius of an element as you move down a group? | increases
| What has to happen for an atom to be electrically neutral? | it has the same number of protons and electrons
| What is the average atomic mass for cesium with 75% 133, 20% 132,and 5% 134? | 132.85
| How many electrons are in a Mg +2 ion? | 14
| If you have 55 protons and 82 neutrons for Cesium, what is the mass number? | 137
| What group would it be the most difficult to remove 1 electron? | group 17
| What is the density of Mercury if the volume is 2.9ml and the mass is 5g? | 1.72g/ml
| If you have Hydrogen, Lithium, and Sodium, what are the two similarities among these elements? | they have similar physical and chemical properties |
