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Chemical Physical Property
Periodic Table
Chemistry Vocab
First 20 Elements
Bohr and Lewis
100
freezing point, state, conductivity are examples of which type of property?
physical property
100
Are groups or families on the periodic table vertical or horizontal?
vertical
100
Everything is either matter or _____________.
energy
100
name 3 noble gases in the first 20 elements
He, Ne, Ar
100
which model shows electron configuration?
Bohr
200
a substance's ability to change into other substances is an example of what?
chemical property
200
what do families on the periodic table have in common?
characteristics and reactivity
200
Is methane (CH4) an example of a molecule, a compound or both?
both
200
Name an element in the first 20 that has 22 neutrons.
Argon
200
Which model shows just valance electrons?
Lewis
300
catching fire and burning in air are examples of what property?
chemical property
300
Mendeleev first ordered the periodic table by what?
atomic mass
300
what are valence electrons?
electrons in the outer orbital
300
How many elements in the first 20 naturally occur in liquid form?
none
300
How many valance electrons are characteristic of the Alkali Earth Metals?
two
400
malleability and conductivity are physical properties that describe what?
malleable - flexible, bendable, moldable conductivity - ability to transfer heat and electricity
400
What happens when you move down by a period?
add an orbital
400
An atom that has a different number of neutrons than protons is called a ___________?
isotope
400
How many alkali metals are there in the first 20 elements?
three
400
Draw a Bohr diagram for Krypton (Kr)
2 - 8 - 18 - 8
500
What needs to be added to bread dough and yeast in order to produce a chemical change?
heat
500
How many neutrons are in lead?
125
500
brass is a metal that is an example of a(n) _____?
alloy
500
name all the elements in the first 20 that have the same number of protons as neutrons.
Ca, S, Si, Mg, Ne, He, C, N, O
500
Look on the board. Based on the Lewis dot structures how many Hydrogens have to bond to Nitrogen to make a stable molecule?
three