Chapter 1 Flashcards
What are valence électrons
An électron chat controls the outmost energy Level in a atom,
Number of Valence électrons are found where
In the Group Numbers
What Is an atom
The smallest part of chat élément that has All the proprettes of that element
What Is an élément
- A pure substance that cannot be broken down
What are atoms made out of
Protons
Neutrons
Electrons
In a neutral atom:
# of protons = ?
Atomic mass = ?
# of electrons = ?
of protons = atomic number
Atomic mass = # of protons + # of electrons
# of electrons = # of protons
Where would you find a group and a period on a periodic table
Group = numbers 1-7
Periods = numbers 1 - 18
What does the term exothermic a mean
A chemical change in which energy is absorbed from the surroundings ( enters the reaction)
What a does the tern endothermic mean
A chemical change in which in energy is absorbed from the surroundings ( enters the reaction )
What are the three types of ions
1 monoatomic
2 poly atomic
3 multivalent
How do you name a monoatomic ion
If it’s a positive ion, name the element and add ‘ ion’ to it ( EX sodium ion )
If it’s a positive ion, name the element, change the ending to ´ide ´ then add ion ( EX chloride ion )
How do you name a polyatomic ion?
Do Not change the ending use name from chart
Metal ion
Loses Electrons that become a positive electron called a cation
Non-Metal ion
Gain electrons that become negative called an anion
How Do you name of multi valent ion?
Indicate the charge present, using Roman numerals ( iron (II) ion )
