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Atomic Structure

Chemistry - Atomic Structure

QuestionAnswer
Define ions Atoms that have a net positive or negative charge
Ions can be _______ or _______. Cations or anions
Define cations Ions formed when atoms lose electrons
Define anions Ions formed when atoms gain electrons
Any ion with a negative charge Anion
Any ion with a positive charge Cation
Any ion of a single atom formed when an electrically neutral atom gains or loses electrons Monatomic ion
An ion that consists of two or more atoms; that is, a group of two or more atoms with an overall electrical charge Polyatomic ion
An atom has 30 protons in the nucleus. How many electrons need to be in the orbitals of the atom for it to be considered electrically neutral? 30
True/False Every atom is electrically neutral False
What does an atom need to be electrically neutral? The same number of positive and negative charges
Atoms that gain or lose electrons will become Electrically charged
An atom that carries a charge, either negative or positive, is called a(n) Ion
How do you find the mass number? protons + neutrons = mass number
Define isotopes Atoms of the same element that differ in the number of neutrons in the nucleus but have the same number or protons.
Where are the noble gases located on the periodic table of elements? On the far right
What is the atomic number? The number of protons
How do you find the number of electrons? The number of protons minus the charge
Define monatomic ions. Any ion of a single atom formed when an electrically neutral atom gains or loses electrons
Define polyatomic ions. An ion that consists of two or more atoms; a group of atoms with an overall electrical charge
What is an atomic mass unit? the mass of 1/12 of a carbon-12 atom
Define average atomic mass the weighted average of all the isotopes in a sample of an element, taking into account their different atomic masses and their different abundances in nature
 

 



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