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ELEMENTS
Ionic or Covalent?
PROPERTIES
Polarity
MISC.
100
What is the symbol for Sodium
What is Na?
100
MgO - Ionic or covalent?
What is IONIC! Mg is a metal, O is a nonmetal.
100
Name 2 characteristics of covalent bonds
What is a low melting point, no electrical conductivity, weaker bonds than ionic
100
When an atom loses an electron, it becomes a ________________.
What is a positive ion.
100
The properties of solid metals can be explained by the ________________ of and the bonding among metal atoms.
What is STRUCTURE
200
Elements from which NONMETAL group are the most reactive?
What is the Halogen Family? (F, Cl, Br)
200
Diatomic Oxygen (O2)
What is covalent? MOST diatomic molecules are covalent.
200
Name 3 properties of metals
malleabililty, ductability, thermal and electric conductivity, luster.
200
A metal crystal consists of positively charged metal ions embedded in a "sea" of freely moving _________________
What is valence electrons.
200
Solid metals are good conductors of heat and ______________________.
What is ELECTRICITY
300
How many atoms of group 17 element would be needed to react with one atom of a Group 2 element?
What is 2! Group 2 elements have 2 electrons to give up and group 17 can only accept 1, so it takes 2 group 17 elements.
300
CO2 (carbon dioxide)
What is covalent?
300
Name 3 characteristics of ionic bonds.
What is electrical conductivity (when dissolved in water), high melting and boiling point, crystalline!!
300
Because the electrons in a molecule of hydrogen fluoride (HF) are more strongly pulled by the fluorine atom, the molecule is _____________________.
What is POLAR.
300
Compare a covalent bond to an ionic bond.
What is Covalent - sharing, Ionic - giving/taking, Ionic M & NM, Covalent - NM & NM.
400
In an electron dot diagram of AL (aluminum), how many dots should be drawn around the elements symbol?
What is 3!
400
Explain how a bond forms between sodium and chloride in sodium chloride (NaCl).
What is Na has 1 valence electron and chlorine has 7 valence electrons. Sodium loses an electron to chlorine. Na has a +1 charge (the positive) and CL has a -1 charge (negative ion).
400
When atoms are _________________ between atoms, a covalent bond is formed.
What is SHARED!
400
Molecular compounds that dissolve in water do not conduct electricity because no _____________________ are present.
What is "charged particles".
400
What is malleabilty?
What is The ability to pound something into complex shapes or sheets.
500
How do electrons relate to the chemical reactions of an element?
What is Valence electrons are the electrons that are most loosely held by the atom and the ones that are involved in chemical reactions. The can be given/taken or shared.
500
Compare a covelant bond and ionic bond.
What is Covalent bond is formed when two atoms share valence electrons. Neither atom loses electrons or takes electrons from the other. No charge particles form. In an ionic bond, one or more electrons are transferred from one atom to another. Atoms that lose electrons become positively charged ions, and atoms that gain electrons become negatively charged ions. These oppositely charged particles then attract each other.
500
Which group of the periodic table has the most reactive elements?
What is alkali earth metals.
500
Explain why metals are such good conductors of heat and electricity.
What is A metal crystal consists of positively charged ions embedded in a sea of electrons that can move around easily. THis space between ions allows electricity and heat to flow.
500
What is the chemical name of NaS2?
What is Sodium Sulfide.