Chem pp2
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20 Terms
1
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What do elements in the same period have in common?
They have the same number of occupied electron shells.
2
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What is the trend of atomic radius as you move across a period?
Atomic radius decreases.
3
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What causes the atomic radius to increase as you move down a group?
The number of electron shells increases, placing valence electrons further from the nucleus.
4
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What is electronegativity?
A measure of an atom's ability to attract electrons towards itself in a chemical bond.
5
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How does electronegativity change across a period?
It increases.
6
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Define first ionization energy.
The energy required to remove the most loosely bound electron from a neutral atom.
7
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How does first ionization energy change as you move down a group?
It decreases.
8
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What is the general trend of metallic character across a period?
It decreases.
9
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What is the reactivity trend for alkali metals as you go down the group?
Reactivity increases.
10
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What characterizes a non-metal's reactivity as you move down a group?
Reactivity decreases.
11
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What is unique about noble gases regarding their reactivity?
They are very unreactive due to having a full outer shell of electrons.
12
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What is the maximum number of electrons the first shell can hold?
2 electrons.
13
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In the Schrödinger model, what are the subshell designations?
s, p, d, and f.
14
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How is subshell electron configuration notated?
Using the shell number, subshell letter, and a superscript to indicate the number of electrons.
15
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What does condensed subshell electron configuration start with?
The symbol of the previous noble gas in brackets.
16
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What does the formula 2n² represent?
The maximum number of electrons that each shell can hold, where 'n' is the shell number.
17
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What is the general trend of non-metallic character across a period?
It increases.
18
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How does ionization energy generally trend across a period?
It increases.
19
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What happens to the effective nuclear charge across a period?
It increases.
20
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What is indicated by the arrangement of elements in groups?
Similar chemical properties due to the same number of valence electrons.
Flashcards (46)