Properties of Elements
Name two physical properties of matter.
Name 2 of: density, boiling point, texture, melting point, conductivity, odor, color, etc...
The charge for 1 proton, 1 neutron, and 1 electron - in that order
p is +
n is 0 (neutral)
e is -
The most reactive group of metals is...
alkali metals
The measure of the ability of an atom in a chemical compound to attract electrons.
Electronegativity
The abbreviation for atomic mass unit.
amu
What did Mendeleev do for chemistry?
made the first periodic table
The number of protons, neutrons, and electrons in a neutral oxygen atom with a mass of 18.
8, 10, 8
What are two properties of noble gasses
colorless, odorless, NONREACTIVE
The measurement of what is required to remove an electron from an atom
ionization energy
the total number of electrons =
the atomic number
(or the number of protons in a neutral atom)
indicate the difference between a group and a period on the periodic table.
group-up and down....period- left-right.
Argon-40 has how many protons, neutrons, and electrons?
What is 18, 22, 18
What are the elements below the periodic table referred to as? why are they placed there?
Rare Earth Elements (or lanthanides and actinides), to Save space
The element with the LOWEST electronegativity
Francium
It indicates the number of protons plus neutrons.
the mass number
(ex: the 12 in carbon-12 or 12C)
What do these two elements have in common?
boron (B) and tellurium (Te)
metalloids, similar properties.
The model of a Nitrogen -14 Atoms would need to have
Must have 7 p, 7 n, and 7 e in 2 energy levels (2,5)
Why is hydrogen placed by itself on the periodic table?
has very different properties, unique properties
Which metal would have the lowest ionization energy
Fr
It is used to find the number of valence electrons.
the group number's ones place
Two elements that would have similar properties to Sulfur
2 of: Oxygen, Selenium, Tellurium, Polonium.
Model of an atom of the most common isotope of fluorine must have
9 protons, 10 neutrons, 9 total electrons
2 rings
7 valence electrons
Pick an element that would have to gain two electrons in order to achieve an octet.
Group 6A elements (O, S, Se, Te, Po)
The relationship between the trends for ionization energy, electronegativity and atomic radius (all three)
IE and E are the same trend, and AR is backwards.
The number of neutrons in the most common isotope of phosphorus
16