Physical Science- CH.5
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What is Mendeleev's periodic table?
- -It arranges elements into rows of increasing mass (increasing the knowledge of scientists)
- -Elements with similar properties in the same column(similar, same. like twins)
Why did Mendeleev leave spaces in the table?
For elements not yet discovered
Was Mendeleev the first to organize the table?
What did Mendeleev have the best explaination for?
How properties related to location in the table
There was a close match between Mendeleev's _________ and _________ properties of elements showed how useful periodic table could be
Give an Example
- predictions and actual
- Eka-aluminum (gallium)
In the periodic table, what are the elements arranged by?
Increasing atomic number (WHO has the BIGGEST NUMBER??)
What is the period?
A row in the periodic table
The number of elements in a period change with _____________(increasing or decreasing) number of _______ available in higher energy levels
Increasing/ Orbitals(orbitals need energy to run[orbit] around)
What are the columns on the periodic table?
Elements in a group have similar _________ configuration, which results in similar ________ properties
What is the pattern of repeating properties called?
Periodic law (the law will never change, so it keeps repeating)
What depends on isotopes and thier abundance, and is also a weighted average?
Atomic mass (WEIGHTED AVERAGE!!!!!)
What is a UNIT that is equal to 1/12 the MASS of a carbon-12 ATOM?
Atomic mass unit
What are some key points about metals? (list 3)
Good conductors, Most are malleable, and many are ductile
What groups are transition metals?
Transition metals form a bridge between elements on what?
Right and left side
Do transition metals form compounds with distinctive colors?
Yes (for red to TRANSITION to purple, it needs blue. red and blue are a COMPOUND, both making the TRANSITION to something else)
Nonmetals are _____ (poor or good) conductors, many gases are at ______ (hot, cold, room) temperature, if solid, they tend to be _______ (hard, soft, brittle) ________ is the most reactive nonmetal
Poor, Room, Brittle, Fluorine
What are some of the inner transition metals?
Lanthanides and actinides
What are the properties called that fall between metals and nonmetals?
Metalloids have the ability to conduct electricity but it varies with ___________
Elements tend to become ____ metallic and _______ nonmetallic as you go from left to right.
Which side are most reactive metals found? Which side are most nonmetals found?
Left side/right side
As you move from left to right, the metals become _______ reactant while nonmetals become _______ reactant.
What is the electron that is in the highest occupied energy level of an atom called?
Do elements in the same group have the same number of valance electrons?
Alkali Metals belong to group _____, have ____ valance electrons, and reactivity ________ (increases, decreases) from top to bottom
1A, 1, increases
Alkali Earth Metals belong to group________, have ______ valance electrons, and are (harder or softer) than metals in group 1A
What are two examples?
- 2A, 2, harder
- Calcium (bones and teeth) and Magnesium (chlorophyll)
Boron belongs to group _______, has _______ valance electrons
_________ is the most abundant metal in earth's crust
- 3A, 3, Aluminum
- *Boron is also found in lab glassware
Carbon belongs to group _______,have _________ valance electrons
- Contains a nonmetal, ___ metalloids, and ____ metals
4A, 4, 2,2
Could life exist without carbon?
What is the 2nd most abundant in crust? (boob jobs hahaha)
Nitrogen belongs group _______, ____ nonmetals, ___ metalloids, ____ metal----- has a ______ (wide or narrow) range of properties-----nitrogen is important for _______ (gotta freeze the poop!!)
5A, 2,2,1, wide, fertilizer
What are isotopes?
Atoms of a given element that have different #s of neutrons and different mass number
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