What can you say about a calcium atom by looking at the symbol 44/20 Ca? a. A calcium atom has 44 neutron s and 20 electrons. b. A calcium atom has 20 protons and 24 electrons. c. A calcium atom has 64 protons and 20 neutrons. d. A calcium atom has 20 protons and 24 neutrons. e. A calcium atom has 20 protons and 44 neutrons.
The answer is d. a calcium atom has 20 protons and 24 neutrons. The 20 means the atomic number. The 44 means the atom mass which is the total of neutrons and protons.
