1) What is a column called in the periodic table and what do the elements in each column have in common?
A)
period; the same atomic mass
B)
group; the same number of electrons
C) period; the same number of atomic orbitals
D) group; the same number of valence electrons

Each column is called a group. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. D is the correct answer

Explanation:

Explanation:

it is a. i hope this .

i think i can answer even without the example. over time with environmental changes, sometimes a group of animals will adapt to better survive. take a moth for example. if the trees the moths use to camouflage themselves from predators, started to die or change colors themselves, the moths may, overtime of course, change color too. its just adapting to its surroundings. hope i was of any : )