Bohr model
What is at the center of the bohr model?
The nucleus/protons and neutrons are at the center of the bohr model
What are the four sub levels?
The four sub levels are S, P, D and F
Does an endothermic or exothermic reaction absorb heat?
Endothermic reactions absorb heat
What are moles used for?
Moles are used to express the amount of a substance such as atoms or molecules while allowing chemists to work with a measurable quantity.
What is the law of conservation of mass?
Mass is neither created nor destroyed in a chemical reaction.
Where are valence electrons located on the bohr model?
Valence electrons are located on the outermost orbit.
Where is the F sub level located on the periodic table?
The F sub level is on the bottom part of the periodic table and the elements are named lanthanides and actinides.
What is activation energy?
Activation energy is the energy required to reach the transitioned state.
What is Avogadro's number?
6.022 x 10^23
What is the law of constant proportions?
A chemical compound always contains the same elements in the same proportion by mass
How many electrons can the second orbit of the Bohr model hold?
The second orbit can hold 8 electrons.
What are coefficients used for? Such as the 3 in 3s2
Coefficients are used to list the period number
What is the equation to find specific heat?
Cp = Q/mΔT
How do you find molar mass of a compound using atomic mass?
Molar mass is found by multiplying the atomic weight of each element by the number of atoms of that element then by finding the sum of all the elements in the compound.
What is the Aufbau principle?
The Aufbau principal says that electrons will fill lower energy levels first
When was the Bohr model invented?
The Bohr model was invented in 1913.
What is the configuration for Ba? Use []
[Xe] 6s^2
If it takes 41.72 joules to heat a piece of gold weighing 18.69 g from 10.0 °C to 27.0 °C, what is the specific heat of the gold?
Cp=Q/mT. Cp=41.72/18.69(27-10). Cp=0.131
How do you find moles using mass and molar mass?
Moles are found by using the equation moles=mass/molar mass
What is daltons atomic theory?
That all matter is comprised of indivisible and indestructible atoms with distinct masses and properties.
How many orbits does flerovium (Fl) have on the Bohr model?
Flerovium has 7 orbits.
What is the configuration for Ho? Use []
[Xe] 4f^11 6s^2
If it takes 640 J of heat energy to increase the temperature of 100 g of a substance by 25 ̊C, calculate the specific heat of the substance.
Cp=Q/mT. Cp=640/25(100). Cp=0.256
How many moles are in 10 grams of Oxygen (O)?
10 grams of oxygen contains 0.625 moles.
What is Boyle’s law?
The volume of gas is inversely proportional to its pressure.