How many protons Neutrons and electrons does 43 20 Ca have?

Is it a physical or chemical change when you take out your best silver spoons and noticed that they are very dull and have some black spots? Is gatoraid bad to drink if you are not exercising? How much mg in a cc? Is the bacteria grows best in high or low temperatures? What is meant by the term normal developmebnt movement? What fills the electron hole in photsystem 1 and 2? Why is the bohr atomic model sometimes called the bohr ruther atomic model? How do you pronounce Remoras? What can 45 watt power? How do you wire a 3-wire 240V 15A pump motor to a GFCI receptacle or GFCI breaker? When states of matter change so does the chemical composition of the molecule? What living thing uses photosynthesis but not in the plant united kingdom? Why does the air temperature get warmer quicker than water? Would a plant with a fiberous root system be easy or difficult to pull out of the ground? How many pounds of ice equal one gallon of water? Where is the observer during a solar eclipse? Why do you think she react this way? How discovered ngombe ilede? Why is it important for euglenas to move toward sunlight? How developed the first known system for classifying living things?