chemistry study guide
group 17 on the periodic table is called?
Halogens
Group 1 on the periodic table is called?
alkali metals
Group 2 on the periodic table is called?
alkaline earth metals
Matter is-
anything that has mass and volume.
An ___ is the smallest unit of an element that maintains the chemical identity of that element.
atom
An ___ is a pure substance that cannot be broken down into simpler, stable substances and is made of one type of atom.
element
which state of matter has No Definite Shape or Volume?
gas
what is A mixture that does not appear to be the same throughout?
heterogeneous mixture
what is a mixture that appears to be the same throughout?
homogeneous mixture
which state of matter has definite Volume, No Definite Shape?
liquid
which class of elements has properties of both metals & non-metals?
metalloids
Which class of elements best conducts electricity?
metals
what is a physical combination of two or more substances.?
mixture
Group 18 on the periodic table is called?
noble gases
which class of elements conducts electricity the worst?
non-metals
ions differ by-
number of electrons
isotopes differ by-
number of neutrons
atoms differ by-
number of protons
A ___ Substance has a fixed composition—composed of just one type of particle (atom or molecule)
pure
which state of matter has definite Shape & Volume?
solid
Mass is-
the amount of three dimensional space an object occupies.
Volume is-
the amount of three dimensional space an object occupies.
Chemistry is-
the study of the composition of matter and the changes it undergoes.
Group 3 -12 on the Periodic table is called?
transition metals
pure substances are either compounds or elements. (TRUE OR FALSE)
true