I have a few Basic Chemistry questions?

Im trying to study for my test next week, but i dont seem to understand this material from my study guide. Can you help me elaborate on this info? If possible please explain the answer. I really need to know this stuff in order to pass my test 1.)Isotopes: a.)are atoms of different elements which have the same... show more Im trying to study for my test next week, but i dont seem to understand this material from my study guide. Can you help me elaborate on this info? If possible please explain the answer. I really need to know this stuff in order to pass my test

1.)Isotopes:
a.)are atoms of different elements which have the same mass
b.)of a given element have equal numbers of neutrons
c.)of a given element have different numbers of neutrons
d.)of a given element have equal numbers of protons and neutrons
e.)are atoms that have gained or lost electrons

2.)Select all that apply.

In the vertical columns of the periodic table:
a.)Atomic weight increases from top to bottom.
b.)Outer shell electrons increase from top to bottom.
c.)The number of shells increases from top to bottom.
d.)All the physical properties are identical.

3.)Periodicity is best defined as:
a.)the fact that elements increase in atomic mass in a regular way
b.)the repeating nature of physical and chemical properties with atomic number
c.)the regular growth of atomic size with atomic mass
d.)the consistent decrease of nuclear charge with atomic mass
e.)the repeating nature of atomic nuclear structure

4.)What does the p mean in 1s22s22p63s1?
a.)the p shell
b.)one of the 4 subshells
c.)always represents the outermost shell

5.)In the vertical columns of the periodic table, as the atomic numbers increase:
a.)The number of electron shells increases.
b.)The ionization energies increase.
c.)The number of electrons in the valence shell increases.
d.)The tendency to lose electrons decreases.
e.)The size of the atom decreases.

I Promise to give 10pts
5 answers 5