Chemistry D425 exam Questions with Complete Solutions
How is matter classified? pure substances and mixtures
Avogadro's number number of representative particles in a mole, 6.02 X 10^23
Words like atom, particles, molecules, use Avogadro's number 6.02x10^23
formula units mean?
Imperial System the system of measurement used in the United States
What is an element? A substance that cannot be broken down into simpler
substances
What is an compound? pure substance that contains more than one element and can
be broken down into chemically simpler components
What is a mixture? is a physical blend of two or more pure substances where
each retains its own identity and properties in the mixture
What are the three phases of matter? solid, liquid, gas
What is matter composed of? atoms
How is energy transferred? heat and work
What is the motion of energy? kinetic energy
what is resting energy? potential energy
What is a molecule ? a group of two or more atoms held together by chemical
bonds
Is matter affected by physical changes? physical changes DO NOT alter the composition of matter
Is matter affected by chemical changes ? Chemical changes transform matter in such a way that the
identity or chemical substance changes
matter can neither be created nor What is the law of conservation of mass?
destroyed
bonding electron pair two electrons shared between atoms
Chemistry D425 exam Questions with Complete Solutions
, Chemistry D425 exam Questions with Complete Solutions
What are core electrons? inner electrons core shell
Chemistry D425 exam Questions with Complete Solutions
How is matter classified? pure substances and mixtures
Avogadro's number number of representative particles in a mole, 6.02 X 10^23
Words like atom, particles, molecules, use Avogadro's number 6.02x10^23
formula units mean?
Imperial System the system of measurement used in the United States
What is an element? A substance that cannot be broken down into simpler
substances
What is an compound? pure substance that contains more than one element and can
be broken down into chemically simpler components
What is a mixture? is a physical blend of two or more pure substances where
each retains its own identity and properties in the mixture
What are the three phases of matter? solid, liquid, gas
What is matter composed of? atoms
How is energy transferred? heat and work
What is the motion of energy? kinetic energy
what is resting energy? potential energy
What is a molecule ? a group of two or more atoms held together by chemical
bonds
Is matter affected by physical changes? physical changes DO NOT alter the composition of matter
Is matter affected by chemical changes ? Chemical changes transform matter in such a way that the
identity or chemical substance changes
matter can neither be created nor What is the law of conservation of mass?
destroyed
bonding electron pair two electrons shared between atoms
Chemistry D425 exam Questions with Complete Solutions
, Chemistry D425 exam Questions with Complete Solutions
What are core electrons? inner electrons core shell
Chemistry D425 exam Questions with Complete Solutions
