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Purple
Green
Yellow
Purple
200
Atomic number is the number of neutrons in the nucleus
What is False
200
what is a horizontal row on the periodic table
What is period
200
Elements that usually are glasses or brittle solids at room tempeture
What is Nonmetal
200
Elements that usually have properties of bothe metal and not metal characteristics
What is metalloid
200
The average mass of an element
What is average atomic mass
300
T OR F Todays periodic tables atomic numbers always decrease form left to right
What is false
300
The sum of the number of protons and neutrons in an atoms nucleus
What is mass number
300
Very small particles of matter that make up protons and neutrons;presently 6 different types of ______ are known
What is quark
400
What charge does a electron have
What is negative
400
Who created the periodic table
What is dimitri Mendeleev
400
Was the periodic table full when Mendeleev made it
What is no it had blank spaces
400
If the energy level in the atom is 4 the number of electrons would be
What is 32
400
T or F is a GROUP the horizontal columns
What is false
500
What is the element Ag
What is silver
500
What is the element for ga
What is gallium
500
What is the chemical symbol for iridium
What is Ir
500
What is the atomic number for hg
What is 80
500
What is the atomic number for aluminum
What is 13