Chapter 1. Worksheet #1b Flashcards
What is a valence electron?
Valence electrons are the electrons that travel on the outermost orbit of an atom
What are electron shells?
Orbits that electrons follow around the nucleus
How are the elements arranged on the periodic table?
In order of increasing atomic number
What are the properties of metals?
=>Solids at room temperature (except mercury) =>Shiny =>Malleable (can be shaped in sheets) =>Ductile (can be pulled into wires) =>React with acids =>High density/heavy =>Conduct heat and electricity
What are the properties of nonmetals?
=>Gases at room temperature =>Dull =>Brittle =>Do not react with acids =>Insulators
What are the properties of metalloids?
Metalloids have some properties of metals and nonmetals
Where can metals be found on the periodic table?
Left side
Where can nonmetals be found on the periodic table?
Right side
Where can metalloids be found on the periodic table?
Right side, separating nonmetals from metals with the “staircase”
The columns of a periodic table are called…
Groups/families
Elements of the same group have…
The same number of valence electrons
The elements in group 1 have ___ valence electrons and are called ____. They react strongly with ____.
1
Alkali metals
Water and halogens
The elements in group 2 have ___ valence electrons and are called ____.
2
Alkaline earth metals
The elements in group 7 have ___ valence electrons and are called ____.
7
Halogens
The elements in group 8 have ___ valence electrons and are called ____.
8
Noble/inert gases
