Unit 1
Unit 2
Unit 3
Unit 4
Random Unit Questions
100
states that mass cannot be created or destroyed
What is the law of conservation of mass
100
How is temperature related to heat?
What is raising a temperature causes the heat of a object to increase
100
Polyatomic Ion
What is a charged chemical species composed of two or more covalent bonds, they can be considered of acting as a single unit
100
a reactant gets their bonds broken to form new bonds in the product
What is how the reactions and products affect are used in a chemical reaction
100
where 2 pairs of electrons are shared with another atom
What is a double bond
200
states that matter is composed of a large number of small particles—individual atoms or molecules—that are in constant motion.
What is the kinetic theory of matter
200
What causes the air in a room to be warmer near the ceiling than near the floor.
What is convection
200
The nucleus is the center of the atom. It is composed of protons and neutrons. Neutrons are neutral and have no charge. Protons have a positive charge and weigh the same as a neutrons. The electrons weigh less than the protons and have a negative charge. Since the nucleus has neutral and positive forces, it is positive and attracts the negative electrons.
What is the relationship between Atom, Nucleus, Proton, Neutron, and Electron
200
any compound of carbon and another element or radical
What is an organic compound
200
states the type of atoms used (using chemical symbols) and #s of atoms in a molecule (using subscripts)
What is a chemical formula
300
melting, freezing, vaporization (boiling and evaporation), condensation, and sublimation
What is directions, flow, and what happens at the particle level during changes in state
300
degree Celsius and degree Farenheit
What are two units are commonly used to measure heat
300
a element that doesn't have specific metallic properties or specific non-metal properties
What are metalloids and semiconductors
300
the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation. a half life is the time required for a quantity of a radioisotope to decay by half.
What is radioactive decay and half life
300
molecules composed of the same group of repeating atoms. ex. plastics, fibers such as hair or nails
What is the definition and an example of polymers
400
physical change is just a change in state or appearance, chemical change is a change in the actual substance and the actual atoms and substances inside
What is the difference between physical change and chemical change
400
What best describes thermal energy
What is the sum of the kinetic energy of all the particles of a substance
400
an attraction between atoms that allows the formation of chemical substances that contain two or more atoms.
What is a description of chemical bonds
400
exothermic reactions release more energy than there needs to be put in the reaction. endothermic releases less energy than there needs to be put in the reaction.
What is the difference between exothermic and endothermic reactions
400
Kinetic and Potential energy added up is mechanical energy
What is the relationship between kinetic and potential energy and mechanical energy
500
kilogram kg, meters cubed m3, joule J
What is the SI units for mass, volume, and energy
500
Which material is most likely to lose the most energy as heat when wrapped around an object
What is plastic
500
because the exact position of electrons cannot be known, scientists consider them to be in these
What is an electron cloud
500
changes in properties, precipitation, gas production, color change,release of energy, absorption of energy, light given off
What are the signs of a chemical reaction
500
unstable isotope that breaks down into a different more stable isotope by process of nucleus of a radioactive isotope releasing a particle and energy; becoming a different isotope in process
What is a radioactive isotope going through radioactive decay
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