Random
Physical and chemical changes/properties
Ionic Bonds
Covalent Bonds
Chemical Formulas
100
The change in which ice absorbs energy and melts is endothermic or exothermic change
Endothermic
100
One example of a physical change
Correct
100
What is a one of the properties of ionic compounds
Form hard brittle crystals, High melting point, and conducts electricity
100
Bond that forms between 2 nonmetal atoms are _______ bonds
covalent
100
A compound may be shown by a(n) _________, which shows the elements in the compound and the ratio of atoms.
What is the chemical formula?
200
How do you calculate density
Mass divided by volume
200
One example of a chemical change
correct
200
If Chlorine gains an electron is becomes more ______
Negative
200
A ______ is a group of 2 or more atoms that are held together by chemical bonds
Molecule
200
H20, CO2 and C12 H22 O11 are all examples of chemical
formulas
300
The volume of an IRREGULAR object can be measured by
Displacement
300
If you heat a liquid and measure the temperature at which it boils, is it a physical or chemical property
Physical
300
The attraction between a positive ion and a negative ion
What is an ionic bond?
300
What holds atoms together in a molecule (Attraction)
Chemical bonds
300
How do liquid water, ice and water vapor differ from each other?
different states of matter
400
All elements are made of small basic particles called?
Atoms
400
If you describe methane as a gas that easily catches fire, you are describing a physical or chemical property
Chemical
400
Magnesium bromide is an ionic compound with the chemical formula MgBr2. What does the "2" tell you?
There are 2 bromide ions to everyone one magnesium ion
400
A bond that shares 2 pairs of electrons
What is a double bond?
400
The chemical name for the compound with the formula NA2S is
Sodium Sulfide
500
The fact that matter is not created nor destroyed in any chemical or physical change is called
law of conservation of mass
500
The tarnishing of a metal is an example of
Chemical
500
Ionic compounds are electrically
Neutral
500
A bond that shares 3 pairs of electrons
What is a triple bond?
500
Electrons involved in bonding between toms are called
Valence electrons
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