Show:
Organizing the Elements
Intro to Atoms
Metals
Nonmetals and Metalloids
Elements from Stardust
100
Mendeleev created the first periodic table by arranging elements in order of ....
Increasing atomic mass
100
Because atoms are so small, what did scientists have to do in order to study them?
Needed to create models.
100
What do gold, silver, copper, and nickel have in common?
they are transition metals.
100
At room temperature, what state of matter can you find more than half of the nonmetal elements?
Gases
100
How does nuclear fusion create new elements inside stars?
small nuclei combine to form larger nuclei
200
How did chemists change Mendeleev's periodic table in the early 1900's?
They used atomic numbers instead of atomic mass to organize the elements.
200
In an atom, the number of protons equals what (be careful)
Protons equals electrons. (Can't answer neutrons because of isotopes.)
200
What are the two most common alkaline metals
calcium and magnesium
200
What property of bromine could you NOT predict based on the fact that it is a nonmetal in the halogen family?
It is a liquid at room temperature.
200
The sun is made up mostly of
hydrodgen
300
From an element's location in the periodic table, what can you predict?
It's properties
300
What does an atomic number indicate?
How many protons in an atom.
300
What do scientists use to make synthetic elements?
A particle accelerator
300
Which group of elements share characteristics with both metals and nonmetals?
The metalloids
300
What natural event provides enough energy for the nuclear fusion reactions that create the heaviest elements?
a supernova
400
What do elements in a column in the periodic have in common? What do elements in a row do?
They have similar properties. Have properties that change in a pattern
400
What parts of the atom move around the nucleus?
the electrons
400
In the periodic table, where are the most reactive metals found?
furthest left - Group 1
400
The elements that do not ordinarily form compounds are?
the noble gases - Group 18
400
Free points to team who picked this category.
400 points
500
What prediction did Mendeleev make that came true less than 20 years later?
That three new elements would be discovered, and he described their properties.
500
Which particles in atoms have a negative electric charge?
The electrons
500
Name the four properties of metals
Shiny Malleable ductile conductors of heat and electricity
500
Fluorine, chlorine, bromine, an iodine are part of a family called?
The halogens
500
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500 points