What is the mass number of an ion with 105 electrons, 159 neutrons and a +1 charge?
express your answer as an integer.

The sum of protons and neutrons in the nucleus of an atom is mass number of an isotope and the number of protons and electrons are equal in a neutral atom.

Here the ion has 105 electrons and 159 neutrons and +1 charge. This means the original atom has lost one electron, originally there are 106 electrons in the neutral atom which shows that there are also 106 protons because in neutral atom protons and electrons are same.

So the mass number of an ion = number of protons + number of neutrons = 106 + 159 = 265

265 is the mass number.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds