Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/38

Click to flip

38 Cards in this Set

  • Front
  • Back
Who was Mendeleev?
A Russian chemist and teacher named Dmitri who discovered an organizing principle for all known elements
What were Mendeleev's main contributions to science?
Mendeleev organized elements based on properties- rows (increasing mass) and columns (similiar properties)
Why was Mendeleev's periodic table such a good model?
The close match between Mendeleev's predictions and the actual properties of new elements showed how useful his periodic table could be
Define Periodic Law
The properties of the elements prepeating at regular intervals when the elements are arranged in order of increasing atomic number
Define Period/series
rows- increasing atomic number
Define Group/family
columns- properties of elements repeating in predictable ways in a group and have similiar electron configurations
What are the modern parts of the periodic table?
metals, nonmetals, and metalloids
What can you tell about an element from the periodic table?
atomic #, name of element, symbol, and atomic mass
define metal.
elements that are good conductors of electric current and heat
Define nonmetal.
elements that are poor conductors of heat and electric current
Define metalloid.
elements with properties that fall between those of metals and nonmetals
define valence electron
an electron that is in the highest occupied energy level of an atom
Why are valence electrons important to the periodic table?
because having the same number of valence electrons is why elements in the same group have similiar properties
electron configuration
the arrangement of electrons in the orbitals of an atom
Why is electron configuration important to the periodic table?
The number of an A group matches the number of valence electrons in an electron configuration for an element in that group.
electron dot diagram
a diagram of an atom, ion or molecule in which each dot represents a valence electron
why is the electron dot diagram important to the periodic table?
because it tells the number of valence electrons
Alkali Metals
1A
Alkaline earth metals
2A
The Boron Family
3A
The Carbon Family
4A
The Nitrogen Family
5A
The Oxygen Family
6A
Halogens
7A
Noble Gases
8A- unreactive
Transition Elements
all elements that do not have groups
Inner Transition Elements
elements at the bottom of the periodic table- not attached
ionic bonding
tranferring of an electron or electrons from one atom to another
properties of ionic compounds
strong attractions among ions within a crystal lattice
metals in ionic bonding
lose electrons and become positive ions
nonmetals in ionic bonding
gain electrons and become negative ions
How are positive and negative ions arranged in ionic bonding
in crystal lattic pattern where each positie ion is surrounded by negative ions and each negative ion is surrounded by positive ions
covalent bonding
sharing of electrons between two atoms
nonmetals in covalent bonding
usually C,H,O,N,S,P
Molecule
basic unit
single covalent bonding
single pair of electrons are shared Ex.- H:H
double covalent bonding
2 pairs of electrons are shared Ex.- 0=0
triple covalent bonding
3 pairs of electrons are shared