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Isotopes and Ions

Isotopes and Ions. Isotopes. Atoms of the same element ALWAYS have the same # of protons. Atoms may have different amounts of neutrons. If they have different amounts of neutrons , they are called isotopes. Carbon’s Isotopes.

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Isotopes and Ions

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  1. Isotopes and Ions

  2. Isotopes Atoms of the same element ALWAYS have the same # of protons. Atoms may have different amounts of neutrons. If they have different amounts of neutrons, they are called isotopes.

  3. Carbon’s Isotopes Because Isotopes differ in # of neutrons, their masses are different too C-14 is radioactive, meaning that it is unstable. This causes it to break down and release radiation and energy.

  4. Ions Positively charged = cations (t looks like +) Negatively charged = anions (aNions: N for negative) Remember: • ATOMS are NEUTRAL (they have the same # of protons and electrons) • IONS have a charge

  5. Cations – Lose electrons Positive Ions: Losing electrons When H loses an electron it is called H+. When Ba loses 2 electrons it is called Ba2+ Elements on the left side of the periodic table are more likely to LOSE electrons to form POSITIVE ions.

  6. Anions – Gain electrons Negative ions: Gaining electrons When F gains an electron it is called F- When O gains an electron it is called O2- Elements on the right side of the periodic table are more likely to GAIN electrons to form NEGATIVE ions.

  7. Review! • Are cations positive or negative? • Are anions positive or negative? • How many electrons do group 17 elements gain or lose? • What will we call Be after it becomes a cation?

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