Ions — Definition & Overview
Read this topicExplanations 4
- We know there are three subatomic particles: protons, neutrons, and electrons. Protons and electrons carry charges. Protons are positive and electrons are negative. For an atom …
By Adrien, Gabi Slizewska, Eric Sears
- Typically atoms are electrically neutral. Why? They have the same number of protons and electrons. But atoms are capable of gaining and losing electrons. If they do, they form c…
By Jasper Brown, Gabi Slizewska, Eric Sears
- (Video) Cation vs. Anion: Definition, Explanation, & Examples by Wayne Breslyn In this video, Dr, B will teach you about how ions form and how you can easily remember the differ…
By Mario Janakis, Eric Sears
- ###Ions Note: The unequal number of protons/electrons is due to the gaining or loss of electrons. If an atom loses an electron, then that atom will have a positive charge (catio…
By Caroline Monahan, Gabi Slizewska, Eric Sears
Problems 20
- Cations‾\underline{\phantom{Cations}}Cations are positive.
- How many electrons does O2−O^{2-}O2− have?
- How many electrons does NH4+NH_{4}^{+}NH4+ have?
- Which ion is written incorrectly?
- Which ion is the most negative?
- The size of an atom is largely based on how many electrons it has. Which ion of sodium do we expect to be largest?
- In order to create an anion, a neutral species must accept‾\underline{\phantom{accept}}accept electrons.
- Ions sometimes‾\underline{\phantom{sometimes}}sometimes have a positive charge.
- Sodium has an atomic mass of 22.99 AMU. The mass of Na+Na^{+}Na+ would be aboutthesame‾\underline{\phantom{about the same}}aboutthesame as the mass of NaNaNa.
- If neutral atom A steals 1 electron from neutral atom B, what are the charges on the resulting atoms?
- Examine the diagram of the lithium ion above. What ion is this?
- Polyatomic ions are often formed when a hydrogen ion (proton) dissociates from the rest of the molecule. A polyatomic ion resulting from this process is a(n) anion‾\underline{\p…
- What is the charge on an ion if it has 20 protons and 22 electrons? Is this an anion or a cation?
- Uranium-238 has 92 protons and 146 neutrons. How many electrons would a 92238U2+^{238}_{92}U^{2+}92238U2+ ion have?
- A fully ionized atom is determined to have a charge of 8 eee. What charge would the resulting ion have if the same atom were found with 10 electrons?
- Consider the reaction below. 2 H2SO4+Ca2++2 OH−→2 HSO4−+Ca2++2 H2O2\text{ }H_{2}SO_{4}+Ca^{2+}+2\text{ }OH^{-} \rightarrow 2\text{ }HSO_{4}^{-} + Ca^{2+}+2\text{ }H_{2}O2 H2SO4…
- Consider the reaction below. 2 H2O→OH−+H3O+2\text{ }H_{2}O \rightarrow OH^{-}+H_{3}O^{+}2 H2O→OH−+H3O+ What is true regarding the ions in this reaction?
- Which ion do we expect to have the greatest magnitude of charge density?
- Which pair of ions have the same number of electrons?
- Which ion has the most electrons?