THE VAST MAJORITY of an atom's mass is contained HERE
What is THE NUCLEUS?
100
A bond in which atoms "share" electrons is known in the science business as THIS type of bond.
What is a COVALENT BOND?
100
THIS scientific law is represented by the mathematical formula: F = MA
What is NEWTON'S SECOND LAW OF MOTION?
100
THIS scientific law requires that chemical equations MUST be balanced.
What is THE LAW OF CONSERVATION OF MASS (OR MATTER).
100
An ALPHA particle is essentially THIS type of atomic nucleus.
What is HELIUM?
200
THE VAST MAJORITY of an atom's volume is found HERE
What is THE ELECTRON CLOUD?
200
Sodium+ joins together with Chloride- in THIS type of bond.
What is an IONIC BOND?
200
In the scientific mathematic formula: Q = mcΔT, the "c" represents THIS.
What is SPECIFIC HEAT?
200
If reactant A is 28g, and reactant B is 22g, then the product will have THIS mass.
What is 50g?
200
THIS is the amount of TIME required for exactly 50% of a radioactive material to decay.
What is A HALF-LIFE?
300
If an atom gains or loses an electron it becomes a charged particle known as THIS
What is AN ION?
300
When two non-metallic elements react together, they form THIS type of bond.
What is a COVALENT BOND?
300
A student has a sample of aluminum that has a mass of
27 g and a volume of 10 cm3. What is the density of aluminum?
(D = M/V)
What is 2.7 g/cm3?
Density = mass/volume
Density = 27 g / 10 cm3
Density = 2.7 g/cm3
300
THESE three coefficients balance this chemical equation:
____Fe + ____ O2 → ____ Fe3O4
What are 3, 2, 1?
300
THIS is why Carbon-14 is RADIOACTIVE, while Carbon-12 is not.
What are TWO EXTRA NEUTRONS IN CARBON-14s NUCLEUS?
400
THIS is the largest naturally occurring atom
What is URANIUM?
400
A covalent bond where elements do not share electrons evenly, is known as THIS type of bond.
What is A POLAR COVALENT BOND?
400
5.0 g of copper was heated from 20°C to 80°C. How much energy was used to heat Cu? (Specific heat capacity of Cu is 0.092 cal/g °C)
(Q = mc∆T)
What is 27.6 cal ?
Q = mc∆T
400
THESE four coefficients balance this chemical equation:
___ZnS + ____O2 → ____ ZnO + ____SO2
What ARE 2 , 3 , 2 , 2 ?
400
If 12.5% of a radioactive sample remains, THIS many half-lives have passed.
What is THREE?
500
Atomic masses are usually expressed
as averages due to the existence of
this phenomenon.
What are ISOTOPES?
500
THIS is a chemical bond between two chemical elements involving four bonding electrons instead of the usual two.
What is A DOUBLE BOND?
500
The temperature of a sample of iron with a mass of 10.0 g changed from 50.4°C to 25.0°C with the release of 47 calories of heat. What is the specific heat of iron?
(Q = mc∆T)
What is 0.185 cal/g° C ?
500
THESE four coefficients balance this chemical equation:
___BaCl2 + ___(NH4)2CO3 → ___BaCO3 + ___NH4Cl
What ARE: 1 , 1 , 1, 2 ?
500
Our sun is said to be very "hot". The reason for all of this "heat" is nuclear fusion of _____ and _____ to produce ______ and a whole lot of energy.