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Determining the NUMBER of Protons Electrons and Neutrons in Atoms, Ions, and Isotopes
NUMBER of PROTONS For any given element, the number of protons equal the atomic number 12 Mg 24.30 ATOMIC NUMBER
Examples 6 6 26 28 53 56
NUMBER of ELECTRONS For any given element, the number of electrons equal the protons. 12 Mg 24.30 Number of protons or Atomic Number
Examples 6 6 26 28 53 56 6 26 28 53 56
NUMBER of NEUTRONS For any given element, the number of neutrons plus protons equal the mass number. 12 Mg 24.30 ATOMIC MASS
Ions Substances that have a positive or negative charge. Created by the change in ELECTRONS. Protons and Neutrons are determined in the same way as atoms.
Number of Electrons in Ions The number of electrons may be calculated as: S 2- 16 - (-2) = 18 Charge of the ion
Examples 11 35 10 36 13 10 8
Isotopes Substances that have the same atomic number but different mass numbers Created by the change in NEUTRONS. Protons and Electrons are determined in the same way as atoms.
Number of Neutrons in Isotopes The number of neutrons may be calculated as: H-1 H-2 H-3 Mass Number
Examples 12 14 6 8 238146 235143
4.3: HOW ATOMS DIFFER ATOMIC NUMBER
Solving atomic calculations: Working with: – Elements – Isotopes – Ions – Atomic # – Atomic mass – Charge.
Atomic Structure Section The Nucleus Nucleus- contains most of the mass of an atom – Protons & Neutrons contains most of an atom’s mass – Electrons-
Atom, Ion, or Isotope?. Atoms Atoms are neutral Protons = Electrons There are special kinds of atoms.... IonsIsotopes.
Atomic Mass & Number Isotopes The Periodic Table.
Atoms Atomic Mass/Number Ions/Charges of Molecules Isotopes/Perc ent Abundance
Atomic Structure: Isotopes and Ions. Isotopes The number of protons for a given atom never changes. The number of neutrons can change. Two atoms.
Mass Number Atomic Number equals the # of... NUCLEUS ELECTRONS PROTONS NEUTRONS NEGATIVE CHARGE POSITIVE CHARGE NEUTRAL CHARGE ATOM.
Atomic Structure. Atomic Number Found on the periodic table.
Ions An atom that carries an electrical charge is called an ion If the atom loses electrons, the atom becomes positively charged (because the number of.
Atomic Information All atoms are composed of the same basic particles, yet not all atoms are exactly the same. Atoms of different elements have different.
Atomic Structure Chm Matter MixturesPure Substances.
The Atom and Its Parts Physical Science. The three subatomic particles are: Proton – Positive charge Electron – Negative charge Neutron – No charge.
IONS and ISOTOPES.
Isotopes and Ions.
Atoms, Ions, Isotopes Changing atoms. Element Substance with a characteristic set of properties Examples?
Isotopes and Ions. Fill in the following table: Symbol Atomic Mass Atomic Number # of protons # of neutrons # of electrons Na Na Ne Ne Hg Hg Zn Zn Al.
Atomic Mass. Atomic Number (A) Number of protons in the nucleus Atoms of the same element all have the same number of protons In a neutral atom, the total.
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