The red lionfish (shown below) is a voracious predator of small fish, including young angelfish and parrotfish. In the Caribbean, red lionfish have no natural predators. What is the most likely long-term outcome of the introduction of lionfish to a pristine reef?

the answer would be an ever-growing amount of red lion-fish. and could result in some extinct species in a pristine reef.

Explanation: all in all people would get rid of the fish before the whole place gets rect.

11 players on a field that has a maximum of 11 players

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.