periodic table
atomic theory
metals
left-overs
radioactivity
100
Mendeleev created his periodic table by arranging elements by what?
What is atomic mass
100
Whose atomic model was a ball of positive charge with electrons embedded in it
Who is Thompson
100
Which of the following metals would be most reactive, magnesium, iron, or nickel?
What is magnesium
100
In an atom the number of electrons is equal to what
What is number of protons
100
What natural event provides enough energy for nuclear fusion to create the heaviest elements?
What is a super nova
200
The sun is composed mostly of this
What is hydrogen
200
Whose experiments led to the discovery of the nucleus ( the positively charged center of the atom)?
Who is Rutherford
200
Aluminum 27 has how many neutrons?
What is 14
200
another name for the group-17 nonmetals is
What is halogens
200
A piece of paper would provide protection from which type of radiation?
What is Alpha radiation
300
The periodic table was changed in the early 1900's to arrange elements in order by what?
What is atomic number
300
Who described electrons as having only certain energy levels moving in specific orbits
Who is Bohr
300
what are 4 characteristics of metals?
What is malleable, ductile, hard, shiny conductors, solids
300
Radioactive isotopes that can be used to detect some medical problems
What is a tracer
400
a row going across the periodic table is called this
What is a period
400
Who envisioned atoms as smooth solid balls?
Who is Dalton
400
Which group of elements will react violently with elements from group 1?
Group 17 - the halogens
400
Look at the element in the 3rd period of the 18th group. This elements state of matter and reactivity would be what?
What is a stable gas
400
An atom of Nitrogen -17 undergoing beta decay will result in which element ?
What is Oxygen-17
500
would you expect sulfur to be more chemically similar to oxygen or phosphorus?
What is oxygen
500
Who is credited with the discovery of the neutron?
Who is Chadwick
500
If a metal reacts violently with water, which group is it likely to be found in?
What is Group 1, the alkali metals
500
Henri Bequerel discovered what?
What is radioactive decay
500
An atom of Astatine 211 will undergo alpha decay to produce what element?
What is Bismuth 207
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