Study guide for Chemistry Content Test Key:
What is the definition of matter?
Mass and volume
What are some properties of matter?
Density, color, shape, odor, texture, ductility, reactivity
What is the definition of a liquid?
No definite shape, definite volume
What is the definition of a gas?
No definite shape, no definite volume
What is the definition of a solid?
Definite shape, definite volume
What is the definition of plasma?
No definite shape, no definite volume, particle broken apart
What are the indicators of a chemical change?
Color change, bubbles or gas, heat or light, precipitants
What is the difference between a physical change and a chemical change?
Physical changes can often be undone, chemical can not be undone and are accompanied by a physical change
Give an example of a solution.
Salt water
Give an example of a colloid.
Jell-O, pearls, mayonnaise
Give an example of a suspension.
Pond water
Pond water
Give an example of an element.
C, H, O, Mg, Hg, Uun
Give an example of a compound or molecule.
NaCl, CO2
What part of an atom has a positive charge?
Proton
What part of an atom has a negative charge?
Electron
What part of an atom is neutral?
Neutron
What is in the nucleus?
Protons and neutrons
The valance shell?
Electrons
How many protons in magnesium?
12
How many neutrons in magnesium?
12
How many electrons in magnesium?
12
Which element has 21 protons?
Scandium
What is the atomic number of H-3?
1
What is the atomic mass or mass number of H-3?
3
How many neutrons in a H atom?
0
A H-2 atoms?
1
A H-3 atom?
2
What is a neutral or stable atoms?
When the number of protons and electrons are equal
A positive ion?
An atom with more protons than electrons
A negative ion?
An atoms with more electrons than protons
How many protons in Ca?
20
How many neutrons in Ca?
20
How many electrons in Ca?
20
Is H-3 an ion or an isotope?
Isotope
How many electrons in the valance shell of Na?
1
How many electrons in the valance shell of Cl?
7
What is the charge of Na in NaCl?
+ or +1
What is the charge of Cl in NaCl?
- or -1
Which is an element - Na, NaCl, Na + Cl -> NaCl, or 3Na+Cl- ?
Na
Which is a compound - Na, NaCl, Na + Cl -> NaCl, or 3Na+Cl- ?
NaCl
Which is a chemical formula – Na, NaCl, Na + Cl -> NaCl, or 3Na+Cl- ?
3Na+Cl-
Which is a chemical equation – Na, NaCl, Na + Cl -> NaCl, or 3Na+Cl- ?
Na + Cl -> NaCl
Where are the metals on the periodic table?
Left of the stair step line
the metalloids?
On the stair step line
the non-metals?
Right of the stair step line
What group or family is Mg in?
Alkaline Earth metals
Cu?
Transition metals
Cl?
Halogens
K?
Alkali metals
Ne?
Noble Gasses
What is a period?
The horizontal rows
What is a group or family?
The columns or vertical rows
How many elements in 3H2SO4?
3
What are they?
Hydrogen, Sulfur, Oxygen
What is the co-efficient(s) in 3H2SO4?
3
What is the subscript(s)?
2 and 4
How many atoms in 3H2SO4?
21
How many for each element?
H-6, S-3, O-12
What type of bonding is in CO2?
Covalent
NaCl?
Ionic
Which bonding shares electrons?
Covalent
Transfers electrons?
Ionic
Has them floating freely among the atoms?
Metallic
What factors affect reaction rates?
Temperature, concentration, catalyst, surface area (particle size)
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