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Physics
Physical Science
40 cards
Cards (70)
Hydrogen is converted into
helium
1. In the stellar
nebulae
/ sun core
2. By
nuclear fusion
Big bang theory
Also known as
primordial nucleosynthesis
Big bang theory produced light elements such as Hydrogen and
Helium
, and very few elements heavier than
lithium
Stellar Nucleosynthesis
The creation (
nucleosynthesis
) of chemical elements by
nuclear
fusion
reaction within stars
Stellar Nucleosynthesis
Requires
high
temperature
Requires
high
pressure
Nuclear fusion
takes place
Each
element
has a unique number of
protons
Nuclear reaction
1.
Protons
in the nuclei of
elements
are combined
2. Creating
new elements
Synthetic elements
Created in laboratories through particle
accelerators
, where in target materials bombarded by high-speed particles to create new
elements
London dispersion ills
and
individuals sports
Dipole-dipole
attraction
An
intermolecular
force that exists only in
polar
molecules
Hydrogen bond
A type of
intermolecular
force that exists when
hydrogen
is paired with F, O, or N, as found in DNA
Hydrogen bonding
A special kind of
dipole-dipole
interaction that occurs specifically between a
hydrogen
atom bonded to an oxygen, nitrogen, or fluorine atom
Substances with strong intermolecular forces
Have high boiling point,
melting
point,
viscosity
and surface tension
Collision
theory
States that for a chemical reaction to occur, the reacting particles must
collide
with one another with enough energy and proper
orientation
Increasing temperature, concentration, surface area and pressure
Generally
increase
the rate of chemical
reaction
Fossil fuel
is the most heavily used source of
energy
in the Philippines
Geothermal energy
The form of energy generated by natural processes within the earth, such as hot rocks,
magma
, geysers, and
hot springs
Renewable
sources
Are continuously
replenished
and do not
deplete
over time
Non-renewable
sources
Are finite and
deplete
as they are consumed
Potential greenhouse gas emissions are a crucial factor for evaluating the
sustainability
of
energy
sources
Stoichiometry
1. Determine
formula mass
2. Convert given quantity to
moles
3. Use stoichiometry
ratios
4. Calculate theoretical
yield
5. Calculate percent
yield
Laboratory synthesis of new elements is
artificial synthesis
of elements that requires advanced particle
accelerators
and target materials
High
temperature and high pressure are the necessary conditions for
nuclear fusion
to take place
Biodegradability
and environmental certification are the criteria used in assessing
cleaning
products
Greenhouse gas emissions during energy production are the factor that is most crucial for evaluating the
sustainability
of a particular energy
Renewable energy
Energy that is not
depleted
when used
Fossil fuel
is the source of energy that is most heavily used in the
Philippines
Finely powdered reactants
Exhibit faster reaction rates due to
increased
surface area
Reactions can happen if the
colliding
particles have enough
energy
Saturated
fats
Butter
, eggs, coconut oils,
palm oils
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