Bio 253 A and P Chapter 2 Exam | Atcual Questions and Answers with Verified Solutions | Latest Updated 2026

Bio 253 A and P Chapter 2 Exam | Atcual
Questions and Answers with Verified
Solutions | Latest Updated 2026



What is matter Anything that has mass and takes up
space


What is mass the amount of matter in an object



Weight A measure of the force of gravity on an
object


Chemistry The study of the properties of matter and
how
matter changes


Atoms composed of subatomic particles



Protons Large particles carry a SINGLE POSITIVE
CHARGE


Electrons small SINGLE NEGATIVE CHARGE



Neutron No charge

, 2-8-8 rule The number of electrons that will fit in to
each
electron shell


protons and electrons has to be
equal around nucleus in order to
electrically charge neutrally 2-8-8


What is the number of electrons 2-8-8
that
will fit in the valence shell


Isotopes Atoms of the same element that have
different
numbers of neutrons


Molecules two or more atoms joined together



Compound a thing that is composed of two or more
separate
elements; a mixture.


Chemical bonds the attractive force that holds atoms or
ions
together


electron shell The first shell can hold up to 2 electrons
The second shell can hold up to 8
electrons
The third shell can hold up 8 electrons