chemistry ch. 1 & 2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is dimensional analysis? | conversion of a quantity in one unit to a quantity in another
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| How many atoms are in exactly 1 mol of an element? | 6.022 * 10^23 atoms
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| Are non zero digits significant or not? | significant
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| Are zeros between digits significant or not? | significant
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| Are zeros at the beginning of a number significant or not? | not significant
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| When are zeros at the end of a number significant? | when there is a decimal point
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| How many significant figures are in multiplication and division? | factor with least amount of significant figures will determine
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| How many significant figures are in addition and subtraction? | least significant decimal place
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| The formula for density is: | mass/volume
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| Are columns or rows considered groups in the periodic table? | Columns
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| Where are metals? | left side
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| Where are nonmetals? | right side
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| Where are metalloids? | zig zag
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| Where are electrons found? | traveling around the nucleus
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| Where are protons and neutrons found? | in the nucleus
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| What has to be the same and what could be different? | protons and electrons must be the same
neutrons can be different
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| T or F? Isotopes have the same number of protons, electrons, and neutrons | F. isotopes do not have the same number of neutrons
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| How many atoms are in a decimal of a mol? | decimal * 6.022 10^23
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| How many moles are in a sample containing __ atoms of an element ? | divide sample and 6.022 10^23
subtract notations
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| Mass of a certain mol? | mass x elements mass
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| Molar mass? | g/mol
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| How do you find an atom of a mole? | elements mass / 6.022 10^23
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| Mass of 1 mol of an element? | Elements atomic mass
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| How do you identify the element with the mass and number of atoms? | atoms / 6.022 10^23
/ mol
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| Mol of a certain mass? | provided mass / elements mass
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| What is the mass of __ atoms? | atoms / 6.022 10^23
*elements mass
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
jzach
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