Elements
What element is in group 13, period 6?
Thallium
The atomic number tells you the number of ________ & ___________ in an atom.
Protons & electrons
The group on the periodic table with a full outer shell that is nonreactive.
What is group 18? (Noble gases)
How could you identify an element?
By counting the number of protons
Is Hafnium a metal, nonmetal, or metalloid?
Metal
119 - 50 =
69 neutrons
The group of elements that include the most reactive metals.
What is group 1?
What determines an elements chemical reactivity?
Valence Electrons
What element is in group 12, period 4? Is this element a metal, nonmetal, or metalloid?
Zinc is a metal.
The atomic mass includes what two subatomic particles?
Protons and Neutrons
What type of elements have properties of both metals and nonmetal, and where are they located on the periodic table?
Metalloids. They are located in between the metals and nonmetals on the step ladder.
Is Argon reactive?
Name one element that is nonreactive.
Answers will vary. Must be from group 18.
What is the atomic number of Tungsten?
74
What type of elements are found to the right on the periodic table?
What are nonmetals?
How many valence electrons does Nitrogen have?
5 Valence Electrons
What are some properties of Chlorine?
Chlorine is a nonmetal.
- brittle, non conductor, dull
If at atom of Rubidium has an atomic mass of 85, how many neutrons are in the atom?
48 neutrons
The horizontal rows on the periodic table are known as what?
What are periods?
Lithium