Module 2 (Part 1) - The Periodic Table Flashcards
Term referring to how various elements are grouped based on similar chemical behaviors; recurring properties
Periodic
Scientist who made the most successful and basis for the periodic table
Dmitri Ivanovich Mendeleev
Mendeleev’s table was arranged according to:
Mass number
The modern periodic table is arranged according to:
Atomic number
Sum of protons and neutrons in a nucleus of a specific isotope (whole number)
Mass number
Average number of protons and neutrons or weight average of masses for all natural isotopes of an element (decimal)
Atomic mass
Number of protons in the nucleus of the atoms of that element
Atomic number
The number of protons in a nucleus is always equal to the number of the electrons that orbit around the nucleus: TRUE or FALSE?
In a neutral or nonionized atom, TRUE
When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties.
Periodic Law
Credited for arranging the elements in the periodic table according to atomic numbers
Henry Moseley
How many elements in the IUPAC periodic table of elements?
118
What are the 3 element categories based on the orbitals being filled?
- Main group elements
- Transition metals
- Inner transition metals
Orbital of the last electron added in main group elements
s or p orbital
Orbital of the last electron added in transition metals
d orbital
Orbital of the last electron added in inner transition metals
f orbital
The main group elements consists of elements that can be classified based on their chemical and reactive properties. What are these 3 categories?
- Metals
- Non-metallic
- Metaloid
All metalloid, non-metallic, and metal elements are main group elements. TRUE or FALSE?
FALSE, some metals belong to the transition and inner transition metals. However, it is true that all metalloid and non-metallic elements belong here.
The valence electrons of main group elements reside in the electron shell of the highest ________ (n).
principal quantum number
The valence electrons of transition metals include the _____ and _____ electrons.
ns, (n-1)d
The valence electrons of inner transition metals include the _____, _____, and the _____.
(n-2)f, (n-1)d, and the ns subshells
What are the two series of inner transition metals?
- Lanthanide
- Actinide
- Good conductors of heat and electricity
- Ductile, malleable
- Solid at room temperature with shine and luster
Metals
- Poor conductors of heat and electricity
- Brittle
- Gases, liquids, dull solids
Non-metals
The only metal is liquid at room temperature
Mercury
- Tend to gain e- to form anions
- Oxidizing agents
- Form acidic oxides with water
Non-metals
- Tend to lose e- to form cations
- Reducing agents
- Form basic oxides with water
Metals
- Conduct heat and electricity moderately well
- Semiconductors
Metalloids
