Fill in the blank
true/false
elements
random
random
100
A group is the _________ of elements on the periodic table.
columns
100
Helium is the exceptioned element with 2 valence electrons even though it's in group 8.
true
100
You subtract theatomic mass fron the atomic number
How do you find the number of neutrons in an element?
100
what is the atomic mass of Aluminum?
26.982
100
What is group 15 of elements called?
The Nitrogen Group
200
A period is a ________ of elements
row
200
Boron has the atomic mass of 10.188
False: Boron has the atomic mass of 10.881
200
representative elements contain:__________, ___________ and______________.
metals, metalloids, and nonmetals
200
What is a metalloid?
A metalloid is an element that shares some properties with metals and some with nonmetals.
200
What is a metalloid?
A metalloid is an element that shares some properties with metals and some with nonmetals
300
A __________ is usually gases or brittle solids at room temperature and poor conductors of heat and electricity.
nonmetal
300
Hydrogen has one proton, 0 neutrons, and one electron.
true
300
How many valence electrons does silicon have?
4
300
What are group one elements called?
alaki metals
300
What is a semiconductor?
A semiconductor does not conduct electricity as well as a metal but does conduct electricity better than a nonmetal.
400
The element__________ came from the Norse god of thunder, Thor.
thorium
400
The atomic number Xenon is 131.293
False
400
What is the symbol for Potassium?
K
400
What are the group 8 elements called?
nobel gases
400
How did lead get the symbol Pd?
its latin name plumbum.
500
The symbol for Gold, AU came from __________ meaning "shining dawn" in latin.
Aurum
500
Lithium has 2 valence electrons.
False
500
What is the atomic number for carbon?
8
500
What is a semiconductor?
A semiconductor does not consuct electricity as well as a metal, but does conduct electricity better than a nonmetal.
500
What is a metal
An element that has luster, is a good conductor of electricity and is ductile
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