Valence Electrons
How many valence electrons does Barium (Ba) have?
2
How many electron energy levels does sodium (Na) have?
3
Is tin (Sn) a metal, nonmetal, or metalloid?
What phase of matter is nitrogen (N)?
Gas
Name the 3 subatomic particles and their charges
Protons: Positive
Neutrons: Neutral
Electrons: Negative
How many valence electrons does Antimony (Sb) have?
5
How many electron energy levels does germanium (Ge) have?
4
Is selenium (Se) a metal, nonmetal, or metalloid?
What phase of matter in lithium (Li)?
Solid
Where are electrons located on an atom?
The outermost shell
How many valence electrons does iron (Fe) have?
Iron varies so we do not know unless we know the charge.
How many electron energy levels does radon (Rn) have?
6
Contrast two physical properties of metals and nonmetals
•Metals Nonmetals
•Positive ions Negative ions
•Shiny Dull
•Malleable Brittle
•Good conductor Poor conductor
Where are the gases located on the periodic table?
To the right of the staircase plus hydrogen
How many electrons can the 3rd energy level hold?
18
Which one of the following elements have the most valence electrons:
•Fr Ni Bi I
I
How many electron energy levels does helium (He) have?
1
Which metalloid is essential for making computer chips?
Silicon (Si)
What are the liquids on the periodic table?
Bromine and Mercury
What is the mass of a proton?
1 amu
What are the groups on the periodic table and how do they organize the elements?
The groups are the vertical rows and organize the elements by valence electrons
What are the periods on the periodic table and how do they organize the elements?
Periods are the horizontal rows and organize the periods by electron energy levels?
How do we use the periodic table to determine the phase of matter for the elements?
•Gases are to the right
•Liquids are Br and Hg.
•Everything else is a solid
How do we identify the solids on the periodic table?
To the left of the staircase
An isotope of the element Iodine has an atomic mass of 135. How many neutrons does it have?
82