PBHS Chem 1 Ch 6.1 Word Scramble
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Question | Answer |
1829 German chemist named ________ organized elements into a table | J.W. Dobereiner |
group of three elements with similar properties | triad |
example triad | chlorine, bromine, iodine |
1869 Russian chemist _____________ published a table of elements | Dmitri Mendeleev |
published later in the same year that Mendeleev published his table; this German chemist receives little notice for his work | Lothar Meyer |
Mendeleev arranged the elements in his table in order of __________ | increasing atomic mass |
Mendeleev left gaps in his table, predicting that ________ & ________ would be discovered to fill them | gallium & germanium |
1913, this British chemist ___________ recognized that Mendeleev had a few elements out of order and reordered the elements based on their _____________ | Henry Moseley, increasing atomic number |
on the Periodic Table, rows are called | periods |
on the Periodic Table, columns are called | groups |
each period corresponds to a _________ | principal energy level |
period 1 corresponds to the _____ energy level | first or 1s |
period 2 corresponds to the ______ energy level | second or 2s & 2p |
the elements within a column or group have simlar properties. This pattern of properties repeats as you move from one period to the next. This is called the _______________. | periodic law |
80% of the elements on the periodic table are classified as ____ | metals |
metals are good __________ of heat and electricity | conductors |
all of the metals are _______ except for ________ which is a ______________ | solids, mercury, liquid |
to the upper right of the periodic table are found the _____________ | non-metals |
many of the non-metals are _________, with the exception of ________ which is a liquid | gases, bromine |
elements found on either side of the stair-step line are called ___________ | metalloids |
metalloids have properties of both __________ and ____________ | metals & non-metals |
a common metalloid element is _________ and is the primary component of ___________; this element is used in making computer chips and glass | silicon, sand |
identify this element as a metal, non-metal or metalloid: gold | metal |
identify this element as a metal, non-metal or metalloid: sulfur | non-metal |
identify this element as a metal, non-metal or metalloid: barium | metal |
name two elements that have similar properties to sodium | lithium, potassium, rubidium, cesium, francium |
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