Questions
Questions
Questions
Questions
Questions
100
Ice melting is a physical change
Is ice melting a physical or chemical change?
100
It tells you the type and number of atoms in a single molecule.
What does a chemical formula tell you?
100
Iodine, Bromine, Chlorine, and Astatine
Using periodic table. What four elements have chemical properties similar to those of fluorine in column VII A?
100
nonmetal
Is this element a metal, nonmetal, metlalloid? I.
100
The elements on the right side are generally denser then the elements on the left side.
Which of the following correctly compares the elements on the right side of the periodic table with the elements on the left side of the periodic table?
200
The ice pack is an endothermic reaction because it absorbs heat. If you put the pack on your skin it will pull heat energy from your body and feel cold.
Most first-aid kits have chemical-filled packets that, when squeezed, grow very cold. Is the chemical reaction in such a packet endothermic or exothermic?
200
An exothermic reaction produces heat and an endothermic reaction absorbs the heat
What is the difference exothermic and endothermic reactions?
200
metal
Is this element a metal, nonmetal, metlalloid? Ag.
200
Sodium and Magnesium
Use the periodic table to name two metals other than Li that probably tarnish quickly in air
200
It becomes a gas at room temperature and pressure.
What is a property of fluorine, a nonmetal?
300
Compound occurs when two or more atoms to form a new substance.
When does a compound occur?
300
It is a substance that cannot be broken down into simpler substances by physical and chemical means.
Is it possible that an element be broken down?
300
nonmetal
Is this element a metal, nonmetal, metlalloid? P.
300
Sodium and Chlorine
What are the two elements that make table salt?
300
filter paper, water, and beakers
What is the equipment that is best to separate a mixture of sugar and water?
400
Carbon has 3 atoms and hydrogen has 8 atoms.
Propane has the chemical formula C3H8. How many hydrogen and carbon atoms are in a molecule of propane?
400
Atoms
What is an element made of?
400
metal
Is this element a metal, nonmetal, metlalloid? Li.
400
Potassium and Fluorine
What are the two elements that make salt?
400
C5H20
Five molecules of methane contain five carbon atoms and twenty hydrogen atoms. What is the chemical formula of methane?
500
A molecule is a unit of a compound.
What is a molecule?
500
Molecule
What is a unit of a compound?
500
metalloid
Is this element a metal, nonmetal, metlalloid? Te.
500
H2O2
A molecule of hydrogen peroxide has one more oxygen atom than a molecule of water. What is chemical formula of hydrogen peroxide?
500
They conduct electricity and heat; shiny, malleable, and ductile.
What are the properties of a metal?
M
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