chemistry test ﴾ⵙᗝⵙ﴿ Flashcards
(31 cards)
any substance that mass and takes up space is called what?
matter
what is a particle?
the building block of batter
what is a reactant?
a substance that is the starting material for a chemical change
what is a Molecule?
Smallest part of a substance. They are made up of one or more atoms.
what are Atoms?
the smallest particle of a chemical element that can exist.
what is Precipitate?
- A solid formed in some chemical reactions.
what is a Subatomic particle
Neutrons, electrons, and protons. a particle smaller than an atom
what is a Neutron?
One of the three subatomic particles that make up an atom. Neutrons are neutrally charged.
solid partials have …
A fixed volume and shape
liquid particles have…
No fixed shape and fixed volume
gas particles have…
No fixed volume or shape
what is an element?
basic unit of matter/ combination of protons neutrons and electrons
what is a proton
It is one of the subatomic particles that make up an atom. protons are positively charged and help with the movement of electrons.
what is a electron
it is one of the subatomic particles that make a an atom and carry a negative charge
how many atoms are there in an element
one ( an atom is and element )
what does the atomic number tell as
number of protons
what does the atomic mass/ weight ( mass number ) tell as about an atom
number of protons + neutrons
what does COBALT stand for ?
C- color change O-odor B-bubbles A- appearance or dissidence of substance L- light and sound T- temp change
what is COBALT used for
it is signs of chemical change
what is sublimation
solid into gas e.g dry ice
what is condensation
gas into liquid e.g a can of cold soda
protons and electrons are the same T or F
T
the period number says what?
the number of shells
the group number says what?
the number of electrons on the outer shell
