Properties
When solid LiF is added to water what kind of compound is it and does it conduct electricity?
ionic and does conduct electricity
Bohr used the solar system as a model to explain the structure of an atom. What particle in an atom do the planets represent in this model?
electrons
Which of the following elements is the least reactive and why?
Chlorine
Sodium
Argon
Boron
Argon - Noble gas - full outer shells
What is the correct word equation that restates the equation shown?
Mg(s) + CuO(s) ---> MgO(s) + Cu(s)
Magnesium + Copper (II) oxide ----> Magnesium oxide + Copper
The boiling of water is considered a physical change because ?
the process is reversible
Acid rain
Table salt
Helium gas
Baking soda
Acid rain
Which of the following pairs are in the same chemical family?
Fluorine and oxygen
Fluorine and chlorine
Sodium and neon
Sodium and magnesium
Fluorine and chlorine
What is the Chemical Formula for Carbon tetrahydride?
CH4
How many electrons does an atom of beryllium have?
4
Which is an example of a chemical change? Why?
Liquid nitrogen evaporates
a candle burns
water boils
ice melts
a candle burns - new substance is formed (smoke)
irreversible
Are the following elements metals or non-metals?
Aluminum, Fluorine, Lithium, Phosphorus
metal, non, metal, non
What is the total number of atoms in one molecule of FeCl2?
3
Which describes a physical property?
Hydrochloric acid produces heat when mixed with zinc
Phosphorus burns when exposed to air
Lithium reacts violently with water
Copper conducts electricity
Copper conducts electricity
What elements are in C6H12O6 and how many atoms are in one molecule of the compound?
carbon, Hydrogen, oxygen
24
What does helium, neon, and argon have in common?
they react with other substances in a similar way
What elements are in CH3COOH and how many atoms are in one molecule of the compound?
Carbon, hydrogen, oxygen
8
When sodium and chlorine react creating a ________compound is formed that (will/will not) conduct electricity.
ionic - will
When two (metallic/non-metallic) elements are combined, an/a (ionic/molecular) compound is created
non metallic/molecular
Which of the following is correct?
Fluorine atoms can have 6 protons
Carbon atoms can have 20 protons
Sodium atoms can have 16 protons
Phosphorus atoms can have 15 protons
Phosphorus atoms can have 15 protons
What chemical formula does the picture on the board represent?
H2
CH4
H2O
NH3
CH4