Ions quiz #2 Flashcards
Ions quiz #2
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What is the charge on sodium? The charge on a sodium ion is +1 after it loses one electron. Magnesium has an atomic number of 12. What is the most stable charge for a magnesium ion? The most stable charge for a magnesium ion is +2. What is a cation? A cation is a positively charged ion formed when an atom loses electrons. What ion is formed when an atom of mercury (Hg) loses two electrons? Hg2+ is formed when mercury loses two electrons. What is the charge of a magnesium ion? The charge of a magnesium ion is +2. How many ions with a +1 charge will bond with an ion that has a -2 charge to form a neutral compound? Two ions with a +1 charge will bond with one ion with a -2 charge. Which is a characteristic of all ions? All ions have an unequal number of protons and electrons, resulting in a net charge. What ion is formed when an atom of magnesium (Mg) loses two electrons? Mg2+ is formed when magnesium loses two electrons. What is the charge on a hydroxide ion? The charge on a hydroxide ion is -1. Which of the following is most likely to make a -3 ion? Nitrogen is most likely to form a -3 ion. Which of the following species has the same number of electrons as Cl-? K+ has the same number of electrons as Cl- (18 electrons). Which ion could bond with a calcium ion (Ca2+) to form a neutral ionic compound? An ion with a -2 charge, such as SO4^2-, could bond with Ca2+. How many ions with a +1 charge will bond with an ion that has a -2 charge? Two ions with a +1 charge will bond with one ion with a -2 charge. What is the charge of a chloride ion? The charge of a chloride ion (Cl-) is -1. What type of ion has lost an electron? A cation has lost one or more electrons. If a droplet has three extra electrons, what is its net charge? Its net charge is -3. What is a rule for making a negative ion with negative charge? An atom must gain electrons to become a negative ion (anion). What is a positively charged ion called? A positively charged ion is called a cation. How many electrons will chlorine gain or lose when it forms an ion? Chlorine will gain one electron to form Cl-. What is the most stable ion formed by phosphorus? Phosphorus most stably forms a P3- ion. Which is an atom or group of bonded atoms that has a positive or negative charge? An ion is an atom or group of atoms with a positive or negative charge. Which of the following species has the same number of protons as Fe3+? Fe2+ has the same number of protons as Fe3+ (26 protons). What type of ion forms when an atom loses electrons? A cation forms when an atom loses electrons. What is the net charge of a monatomic ion that has 15 protons? The net charge depends on the number of electrons; if it has 18 electrons, the charge is -3. What is the charge of the hydronium ion? The charge of the hydronium ion is +1. How many electrons are in O2-? O2- has 10 electrons. Which ions are produced when water ionizes? Water ionizes to produce H+ (or H3O+) and OH- ions. What is the charge of a chlorine ion? A chlorine ion (Cl-) has a charge of -1. An ion has a net charge of 3+. If this ion has 8 protons, how many electrons does it have? It has 5 electrons. Under which of the following conditions will an atom be the most stable? An atom is most stable when it has a full valence shell (octet). What type of elements form anions? Nonmetals typically form anions. How many electrons does the oxygen atom need to become stable? Oxygen needs to gain 2 electrons to become stable. Which of the following species has the greatest charge density? Mg2+ has the greatest charge density due to its small size and high charge. Which of the following pairs of ions have the same total number of electrons? Na+ and F- both have 10 electrons. What is the term for an ion with a net negative charge (more electrons than protons)? An ion with a net negative charge is called an anion. What is a cation and where can you find it on the periodic table? A cation is a positively charged ion, typically formed by metals on the left side of the periodic table. Which ion will form a compound with bicarbonate in a 1:1 cation to anion ratio? A +1 cation, such as Na+, will form a 1:1 compound with bicarbonate (HCO3-). Which following ions has the same electron configuration as a noble gas? Na+, F-, and Cl- have electron configurations like noble gases. Which of these ions is isoelectronic to the oxide anion O2-? Ne, F-, and Na+ are isoelectronic to O2-. How does a lithium cation compare to a lithium atom? A lithium cation (Li+) has one less electron and is smaller than a neutral lithium atom.
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