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
A BETA 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?
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)
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?
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.