Biology/orbital rules
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Question
i don't know how to find the atomic mass and the atomic number
Look at any periodic chart (google it)
The large number at the top of each element is the atomic number. (the number of protons)
The smaller number at the bottom is the mass number. It is the mass of the nucleus (protons plus neutrons). It is a fractional number because it includes the averages of all the isotopes.
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Walter Hintz
Expertise
Science teacher for over 50 years. MSc. in biology. I can answer questions in general biology, zoology, botany, anatomy and physiology and biochemistry.
Experience
I have a MSc in biology and have been a science teacher for over 50 years. At present I am a faculty member at a college and a science consultant at seven catholic schools.
Publications
The Ohio journal of Science
Momentum-The Journal of the Catholic Education Association
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