Periodic Table I Periodic Table II Electrons and Ions Flashback Miscellaneous

100

What is: Energy required to remove electron from valence energy level of a neutral atom in ground state (and technically, you should ALSO mention that atom is in the gas state).
This is the definition of 1st IONIZATION ENERGY.

100

What is potassium (K)?
This is the element in period 4 with the lowest ionization energy.

100

What is Arsenic (atomic #33)?
This element gains 3 electrons to become isoelectronic with krypton.

100

What is 3?
A and B are electrons in the same atom. Both are in the same px orbital in quantum level 4. How many quantum numbers do they share?

100

What is Se highest, then As, and finally lowest K?
This is the order from highest to lowest electronegativity for these elements: K, As, Se.

200

What is ELECTRONEGATIVITY?
This is the only periodic trend we are studying that relates directly to chemical bonds.

200

What is gallium?
Comparing aluminum and gallium, this metal is the more reactive of the two.

200

What is a 2- charge, and what is configuration of neon? (10 electrons)?
An oxygen ion has this charge, and the same electron configuration as this noble gas.

200

Aufbau means "building up", and applies to building up bigger and bigger electron clouds, by electrons occupying lowest available energy orbital.
This is translation of the German word, "aufbau," and this is how the word applies to electrons in atoms.

200

What is 6.02 x 10^23 molecules of water, you silly goose!?
This is the number of molecules of water in 1 mole of water.

300

What is nitrogen?
This is the most reactive nonmetal element in group 15.

300

What is lithium?
Comparing lithium and sodium, this element is the less reactive of the two.

300

What is Te 2-, the teluride ion.
When barium becomes a cation, its electron configuration is the same as the configuration for this group 16 anion.

300

What is 30 grams?
This is the mass of 2.5 moles of carbon (nearest whole number answer).

300

What are 2 moles of Na and 2 moles of Cl?
This is the number of moles of Na AND the number of moles of Cl in 2 moles of sodium chloride, NaCl.

400

What are fluorine, oxygen, and nitrogen?
These three elements are the most electronegative, surpassing all other species in their ability to hold onto electrons.

400

What are valence electrons?
Only these electrons are shown in symbols called "dot structures".

400

What are the highest occupied quantum level s and p electrons?
Valence electrons (in general) found in orbitals in these energy levels.

400

What is: A compound that forms a solution that conducts electric current when dissolved in water?
This is the meaning of the word, "electrolyte".

400

What is 58.6, so about 59 grams?
This is the molar mass of Mg(OH)2, magnesium hydroxide. (Nearest whole number OK)

500

What is group 18, or the noble gases?
The effective nuclear charge, Z, is equal to 8 for elements in this group.

500

What is Ca 2+?
Of isoelectronic species Cl 1-, S 2-, K 1+, and Ca 2+, this particle has the smallest radius.

500

What is smaller, and electrons in same Major quantum level, attracted by 13 compared to Neon's 10 electrons.
While isoelectronic with Neon, the aluminum ion (Al 3+) has larger/smaller radius, and this is why.

500

What is: Two electrons in same orbital repel slightly, so lower energy to fill singly.
This explains why electrons fill equal energy orbitals singly before pairing-up in any one orbital (explains Hund's rule).

500

What is 3.42 mol Fe x 55.85 g /1 mol Fe = 191 g
This is how you would use dimensional analysis to find the number of grams in 3.42 moles of iron. (go to board and show us!)

electronic structure and periodicity

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