Unit 2 - Periodic trends Flashcards
What is coulombic attraction?
The attraction between oppositely charged particles (protons and electrons)
What happens as the distance between electrons and protons is increased?
The force of attraction decreases
What happens as the number of protons increases?
The force of attraction increases
The more protons, the greater the-
attraction
Does the distance from the nucleus determine the attractive force between the outermost electrons and the nucleus?
yes
What are metals?
Elements that are shiny and good conductors of heat and electric current
What 2 qualities do metals have?
They are malleable and ductile.
What does malleable mean?
Can be hammered into thin sheets
What does ductile mean?
They can be drawn into thin wires
What are nonmetals?
Elements that are dull (not shiny) and are poor conductors of heat and electric current.
Are solids malleable and ductile?
no
What are metalloids?
They are also called semiconductors. They have properties of both metals and nonmetals.
What are the properties of metals?
Ductile, malleable, lustrous, conduct electricity, form cations
What are properties of nonmetals?
Brittle, dull, don’t conduct, form anions
What properties do metalloids have?
Properties of both metals and nonmetals!
Elements in the period table are shown with their states at ______ ____________.
room temperature
What are diatomic molecules?
Elements that are always found as a pair.
How many diatomic molecules exist?
7
What are the columns on the periodic table called?
Families/Groups
How are elements organized into families?
Based on the number of valence electrons they have.
How many valence electrons to Alkali metals have?
Only 1
Are noble gases reactive? What is a nickname for them?
No, they aren’t reactive. That’s why they are said to be “inert”.
