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25 Cards in this Set
- Front
- Back
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What group are alkali metals in on the periodic table?
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Group 1
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What group are halogens in on the periodic table?
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Group 17
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What group are alkaline earth metals in on the periodic table?
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Group 2
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What group are noble gases in on the periodic table?
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Group 18
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How does the reactivity of alkali metals change as you move down the group?
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It increases.
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How many valence electrons do halogens have?
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7
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What charge do alkali metals generally form when they lose one electron?
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+1
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What charge do halogens generally form when they gain one electron?
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-1
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What are positively charged ions called?
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Cations
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What are negatively charged ions called?
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Anions
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Which group of elements has properties of both metals and nonmetals?
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Metalloids
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What is the general trend for electronegativity across a period in the periodic table?
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It increases.
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What is the general trend for ionization energy across a period in the periodic table?
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It increases.
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What is the general trend for atomic size down a group in the periodic table?
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It increases.
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What is the general trend for atomic size across a period in the periodic table?
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It decreases.
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Which is the most reactive halogen?
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Fluorine
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What is the name of the group of metals in the middle of the periodic table, in the d-block?
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Transition Metals
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Which group on the periodic table is also known as the "coinage metals"?
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Group 11
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What is the name of the two series of elements located in the f-block of the periodic table?
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Lanthanides and Actinides
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Who is credited with the development of the first periodic table?
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Dmitri Mendeleev
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What unique feature did Dmitri Mendeleev include in his original periodic table that allowed for the discovery of new elements?
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He left gaps for elements that were not yet discovered.
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What is the principle behind the organization of elements in the periodic table, which states that when elements are arranged in order of increasing atomic number, their properties repeat periodically?
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Periodic Law
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What property determines the position of an element on the periodic table and is unique to each element?
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Atomic Number
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Who was the scientist that discovered the concept of atomic number and reorganized the periodic table based on this concept?
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Henry Moseley
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In which century was the periodic table developed and refined?
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19th century (1800s)
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