The nucleus contains most of the mass of an atom and is positively charged.
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Q39: Which element has the following orbital diagram?
Q40: How many protons are in the isotope
Q41: Which element is located in period 3,Group
Q42: The element symbol S represents sodium.
Q43: Helium is an s block element.
Q45: Electrons are negatively charged and have the
Q46: Antimony is a metalloid containing 51 protons
Q47: Nonmetals have a shiny appearance,and they are
Q48: What is the Period and Group for
Q49: Zirconium (Zr)is an element classified as a
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