Number of proton K=19
so, 42 - 19 =23
then the answer in 19 protons and 23 neutrons
It showed that the nucleus is positively charged, and that the atom isn't just made of electrons.
In multicellular organisms, the body is a system of multiple interacting subsystems. These subsystems are groups of cells that work together to form tissues and organs that are specialized for particular body functions.
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Answer: Metals are malleable. Most metallic elements are solids at room temperature.
Explanation:
<span>Lyle stirs 5.0 grams of salt into a beaker of water. He then adds 15.0 grams of pure iodine to the mixture. If the total mass of the new mixture is 225 grams, what is the mass of the water
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