Unit 4 Flashcards
What are valence electrons and why are they important
The electrons on the outer orbital they are important because they can form bonds with other atoms
What atoms do scientist speculate that can be a basis of life other that carbon
The atoms in the same column because they have the same number of valence electrons
Why are the noble gasses important
Because they have an ideal electron configuration (8 valence electrons)
What is the octet rule
It says that each atom tries to get 8 valence electrons
What are the exceptions to the octet rule
Hydrogen, lithium and beryllium
What is the difference between metals and nonmetals
Metals give up electrons
Nonmetals take electrons
How many valence electrons do transition metals have
2
What is ionization energy
The amount of energy that it takes to take an electron away from an atom
What is electronegativity
The amount of energy that it takes to pull an electron to an atom
Name 3 periodic properties of atoms
Ionization, electronegativity, atomic radius
For ionization, electronegativity and atomic radius, which one is inversely proportional to the other 2
Atomic radius
What is the difference between an atom and an ion
Ions have charge, atoms do not
What is the difference between ionic compounds and covalent compounds
Ionic compounds give or take electrons
Covalent compounds share electrons
What is wrong with the formula Mg2O2
All ionic compounds should be in their lowest ratio
What are the 3 gasses that protect us against harmful light that comes from the sun
Ozone, oxygen, nitrogen
What are homonuculear diatomics
Compounds that are formed with molecules instead of atoms
List the homonuculear diatomics
Nitrogen, oxygen, chlorine, fluorine, bromine, astatine and hydrogen
What is a cation
A positively charged ion
What is a anion
A negatively charged atom
