Which of the following is not a property of water?

Hydrogen bonding causes a high surface tension.
Hydrogen bonds exist only in the solid state.
Water can dissolve ionic and polar molecules.
Water's solid state is less dense than its liquid state.

A) hydrogen bonds cause a high surface tension = FALSE

Explanation:

The rest are correct

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.