Weegy: The atomic number is the: number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus.
User: The atomic mass of an element whose atoms consist of seven protons, eight neutrons, and seven electrons is _____.
Weegy: The atomic mass of an element whose atoms consist of eight protons, nine neutrons, and eight electrons is: 17.
User: Pure substances that have properties entirely different from the atoms that make it up are _____.
Weegy: Pure substances that have properties entirely different from the atoms that make it up are compounds. [ ]
User: Atoms that have gained or lost electrons are called _____.
Weegy: Atoms that have gained or lost electrons are called ions.
User: Atoms have a tendency to complete their outer energy level. This is known as _____.
Weegy: Atoms have a tendency to complete their outer energy level. This is known as the OCTET RULE.
User: Fluorine has seven electrons in its outer energy level. According to the octet rule, _____.
Weegy: Fluorine has seven electrons in its outer energy level. According to the octet rule, it wants to take on another electron.
User: Helium has an atomic number of two, so its outer energy level is full. Helium is considered _____.
Weegy: Helium has an atomic number of two, so its outer energy level is full. Helium is considered inert.
User: Table salt is the result of a(n) _____.
Weegy: Table salt is the result of an ionic bond.
User: Positive ions are called _____, and negative ions are called _____.
Weegy: Positive ions are called CATIONS, and negative ions are called ANIONS.
User: Oxygen has an atomic number of 8. The n = 1 energy level has two electrons, and the n = 2 energy level has six electrons. Oxygen's valence is _____.
Weegy: Oxygen has an atomic number of 8. The n = 1 energy level has two electrons, and the n = 2 energy level has six electrons. Oxygen's valence is -2.
User: The bond formed when electrons are ...
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