Periodic Properties
What's the definition of a physical property?
The characteristic of a substance that can be observed without changing their chemical makeup.
alkali metals are found in what Column?
The first left column
What is atomic mass?
The amount of space an atom takes up
What is a Valence Electron?
It is the electrons on the outer-most shells
How many valence electrons are in the d subshell hold?
10
What's the definition of a chemical property?
The characteristics of a substance that can be observed when changing it's chemical makeup.
alkaline earth metals are found in what column?
The 2nd column
Does being an isotope affect an elements mass?
Yes
What charge does an electron have?
Negative
What is the atomic number of an atom that has 4 protons and 6 neutrons?
4
What element was named after Europe?
Europium
What are some properties of metalloids?
Solid at room temperature and weak conductors of both heat and electricity.
How many valence electrons can be held in the third shell?
18
Why do elements in the same group have similar properties?
They have the same number of valence electrons.
Is oxygen's isotope mass stable?
Yes
How many elements make up the Periodic Table?
118
What are some types of metal categories in the Periodic Table?
Alkali metals, alkaline earth metals, transition metals, lanthanides, and actinides.
What is a neutral atom?
Equal number of positively charged protons and negatively charged electrons.
What is the order that subshells fill in electron shells?
s,p,d,f
Is Phosphorus stable?
No
Who created the modern Periodic Table?
Dimitri Mendeleyev
Define ductility.
An element has the ability to be drawn into a thin wire via rolling, stretching, pulling or tugging.
Where is the atomic number located on an element?
Top left.
As you move from left to right among the representative elements, how does the number of valence electrons change?
Valence electrons increase
What is the subshell makeup of Phosphorus?
1s22s22p63s23p2