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20 Cards in this Set

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QUESTION
What is the periodic law?
ANSWER
The periodic law states that when the elemens are arranged according to their atomic numbers, elements with similar properties appear at regular intervals.
QUESTION
What are valence electrons?
ANSWER
An electron that is found in the outermost shell of an atom that determines the atom's chemical properties.
QUESTION
What is a group?
ANSWER
A vertical column on the periodic table.
QUESTION
What is a period?
ANSWER
A horizontal row on the periodic table.
QUESTION
What are the main group elements?
ANSWER
Elements in groups 1, 2, and 13-18.
QUESTION
What are alkali metals?
ANSWER
Elements in Group 1. (hydrogen, lithium, sodium, potassium, rubidium, cesium, francium)
QUESTION
What are alkaline-earth metals?
ANSWER
Elements in Group 2. (berylium, magnesium, calcium, strontium, barium, radium)
QUESTION
What are halogens?
ANSWER
Elements in Grouop 17. (flourine, chlorine, bromine, iodine, astantine)
QUESTION
What are noble gases?
ANSWER
Elements in Group 18. (helium, neon, argon, krypton, xenon, radon)
QUESTION
What are transition metals?
ANSWER
Transition metals constitute group 3 through 12 and are sometimes called the d-block elements because of their position in the periodic table.
QUESTION
What are lanthanides?
ANSWER
Elements on the top row in the bottom section of the periodic table. (lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium)
QUESTION
What are actinides?
ANSWER
Elements in the row below the lanthanides. (actinium, thorium, protactinium, uranium, neptunium, plutonium, americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobelium, lawrencium)
QUESTION
What is an alloy?
ANSWER
A solid or liquid mixture of two or more metals.
QUESTION
What is ionization energy?
ANSWER
The energy that is supplied to remove an electron.
QUESTION
What is electron shielding?
ANSWER
The reduction of the attractive force between a postively charged nucleus and its outermost electron due to the cancelation of some of the positive charge by the negative charges of inner electrons.
QUESTION
What is bond radius?
ANSWER
The length that is half the distance between the nuclei of two bonded atoms.
QUESTION
What is a nuclear reaction?
ANSWER
A reaction that affects the nucleus of an atom.
QUESTION
What is a nuclear reaction?
ANSWER
A reaction that affects the nucleus of an atom.
QUESTION
What are superheavy elements?
ANSWER
An element whose atomic number is greater than 106.
QUESTION
What are superheavy elements?
ANSWER
An element whose atomic number is greater than 106.