Question | Answer |
What is dimensional analysis? | conversion of a quantity in one unit to a quantity in another |
How many atoms are in exactly 1 mol of an element? | 6.022 * 10^23 atoms |
Are non zero digits significant or not? | significant |
Are zeros between digits significant or not? | significant |
Are zeros at the beginning of a number significant or not? | not significant |
When are zeros at the end of a number significant? | when there is a decimal point |
How many significant figures are in multiplication and division? | factor with least amount of significant figures will determine |
How many significant figures are in addition and subtraction? | least significant decimal place |
The formula for density is: | mass/volume |
Are columns or rows considered groups in the periodic table? | Columns |
Where are metals? | left side |
Where are nonmetals? | right side |
Where are metalloids? | zig zag |
Where are electrons found? | traveling around the nucleus |
Where are protons and neutrons found? | in the nucleus |
What has to be the same and what could be different? | protons and electrons must be the same
neutrons can be different |
T or F? Isotopes have the same number of protons, electrons, and neutrons | F. isotopes do not have the same number of neutrons |
How many atoms are in a decimal of a mol? | decimal * 6.022 10^23 |
How many moles are in a sample containing __ atoms of an element ? | divide sample and 6.022 10^23
subtract notations |
Mass of a certain mol? | mass x elements mass |
Molar mass? | g/mol |
How do you find an atom of a mole? | elements mass / 6.022 10^23 |
Mass of 1 mol of an element? | Elements atomic mass |
How do you identify the element with the mass and number of atoms? | atoms / 6.022 10^23
/ mol |
Mol of a certain mass? | provided mass / elements mass |
What is the mass of __ atoms? | atoms / 6.022 10^23
*elements mass |