Chemistry #1
A type of chemical reaction which absorb heat energy from the surroundings during the reaction.
What is an endothermic reaction?
In a chemical reaction, atoms are not created or destroyed.
What is the law of conservation of mass?
The ability to do work (i.e. make something happen).
What is energy?
Another term for potential electrical energy.
What is static electricity?
Which is the only metal that is liquid at room temperature?
Mercury
A measure of the time it takes for half the nuclei in a sample of radioisotopes to decay.
What is half-life?
This acid can be found in lemons, oranges and limes.
What is citric acid?
A process of heat energy transfer via currents within liquids or gases due to differences in densities.
What is convection?
Describes how much work the object could do if set into motion.
What is potential energy?
Which organ in your body uses the most chemical energy?
Brain!
Atoms of the same element that have same number of protons, but different number of neutrons, and therefore have different mass number.
What are isotopes?
This gas is produced when an acid is added to a metal
What is hydrogen gas?
The unit of measure for work and energy.
What are Joules?
The process of heat transfer through direct contact of vibrating particles.
What is conduction?
Which chemical causes the burning taste sensation when eating chillies?
Capsaicin
The type of nuclear decay where a nucleus ejects an alpha particle – a cluster of two protons and two neutrons (the same as a helium nucleus).
What is alpha decay?
An atom with an uneven number of protons and electrons
What is an ion?
The flow of thermal energy from an area (or object) of higher temperature to lower temperature.
What is heat?
It is determined by the average kinetic energy of the particles in the object.
What is temperature?
What temperature is needed to convert graphite into a diamond?
3000°C
Chemical substances that release hydroxide ions (OH-) when dissolved into a solution. An alkali is a specific example of this type of substance that is soluble in water.
What is a base?
The products of this reaction is NaCl and H2O
What is a Hydrochloric acid and Sodium Hydroxide reaction?
The only type of heat transfer which can occur in a vacuum. This involves transfer of thermal energy through electromagnetic waves.
What is radiation?
Indicates degree to which a substance allows the transfer of heat energy.
What is thermal conductivity?
What is the only letter that doesn't appear in the periodic table?
The letter "J"