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thee Periodic table
study guide
Question | Answer |
---|---|
Periodic table ? | table of element arranged by atomic number |
Before the periodic table | *Was a mess ,*Imagine going to the grocery store , with no organization * no organization of elements ,* difficult to find infomation *chemistry didnt make sense |
period (series) | horizantal rows in the element-oranized from left to right |
Dmitri Mendeleev | russian chemist who made the first periodic table ( father of the perdoic table) |
Dmitri medeleev - how his worked | put elements in rows by atomic mass "coloums in how they recated |
Periodic table ? | table of element arranged by atomic number |
Before the periodic table | *Was a mess ,*Imagine going to the grocery store , with no organization * no organization of elements ,* difficult to find infomation *chemistry didnt make sense |
Dmitri Mendeleev | russian chemist who made the first periodic table ( father of the perdoic table) |
Dmitri medeleev - how his worked | put elements in rows by atomic mass "coloums in how they recated |
Dmitri medeleev- some problems | left blanks for undiscovered elements , turned out right , blank spaces broke the pattern |
current periodic table | now elements are put into rows by increasing atomic number , horizantal rows caused periods or series labled 1-7 . vertial colloms are called groups families labeled 1-18 |
group (family) 1 | elements in the SAME group have SIMILAR chemicial & physical properties . |
group( family) contuied 2 | they have the same number of valence electrons * they will form the same kinds of iron |
group ( family ) contuied 3 | families may be ONE column,or SEVERAL columns put together. |
groups (family ) contuied ?????? 4 | families have NAMES rather than ________ |