Two carbon adams can be joined together three types of covalent bonds which type is the strongest? single covalent bond a triple covalent bond a double covalent bond

Explanation:

While a single σ (sigma) bond is free to rotate, double and triple bonds are rigid because of their π (pi) bonds. ... While a triple bond is the strongest type of bond, it is not three times stronger than a single bond because pi bonds are weaker than sigma bonds.

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.