Adog is trained to sit and shake hands. these traits are most likely?
a. inherited b. not inherited. c. not acquired. d. innate.

B. not inherited.

Explanation:

The inherited trait is the trait an organism acquire from parents after birth. The dog shaking hands is the not inherited trait as it is the triat acquired from the environment in which the dog is living. The dog is trained to sit and shake hands.

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.