Periodic Table
Atoms, Isotopes, etc.
Changes and Properties
Chemical Formulas/Bonds
Nuclear Chemistry
100
The group on the periodic table that has a valence of 1+.
What is group 1?
100
Which one of these scientists described a model of the atom that included energy levels? Dalton, Bohr, Newton, or Thomson?
Who is Bohr?
100
Which of the following is a chemical property of iodine? violet as a gas, silver-black as a solid, reacts with starch to give a dark blue color, or a solid at room temperature?
What is reacts with starch to give a dark blue color?
100
How many atoms of carbon are in a single molecule of sugar (C12H22O11? 12, 22, 11, or 45?
What is 12?
100
In an atom, which force holds the protons and neutrons together in the nucleus? gravity, electromagnetic force, strong force, or weak force?
What is strong force?
200
Of the following, the pair of atoms that have the most physical and chemical properties in common; Ge and Se, K and Kr, Al and Ga,or Ba and Bi.
What is Al and Ga?
200
The number of protons in a neutral atom is equal to the number of.....electrons, neutrons, ions, or isotopes?
What are electrons?
200
Which situation provides the best evidence that a chemical reaction is taking place? a metal strip bends when heated, a solution freezes in the freezer, two solutions mixed in a beaker produce a solid, or a chemical completely dissolves in water and the temperature of the solution doesn't change?
What is two solutions mixed in a beaker produce a solid?
200
Aluminum oxide, Al2O3, is produced by combining Al3+ and O2- particles. What type of compound has been formed? covalent, ionic, metallic, or molecular?
What is ionic?
200
Which of the following elements is most likely to be produced during a nuclear fusion reaction in the Sun? helium-4, hydrogen-1, uranium-235, or uranium-238?
What is helium-4?
300
Of the following the pair of elements that are most similar; Ca and F, Na and Cl, Ne and Ar, or Li and H.
What is Ne and Ar?
300
What accounts for most of the mass of an atom? electrons, protons, neutrons and protons, or electrons and neutrons?
What are neutrons and protons?
300
On Monday, the custodian places an air freshener in the gym. It is a shiny, pink disk. Over the next several days, the disk gradually shrinks. Which of the following statements is a valid inference? the disk is undergoing a chemical change, the disk is undergoing a physical change, the disk is undergoing both a physical and chemical change, the disk is undergoing neither a chemical or physical change?
What is the disk is undergoing both a physical an chemical change?
300
Which statement best describes the atoms of elements that form compounds by covalent bonding? they share electrons between them, they have a large difference in atomic mass, they are in the same period on the periodic table, or they have a large difference in valence electron number?
What is they share electrons between them?
300
Radioactive isotopes are commonly used as.....cooling agents, agricultural pesticides, nutritional supplements, or tracers in biochemical reactions?
What are tracers in biochemical reactions?
400
As you move left to right across a row of the periodic table, what happens to the number of neutrons in a typical atom?
What is the number of neutrons increases?
400
An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom? 29, 25, 64, or 93?
What is 64?
400
A teacher wants to demonstrate a chemical reaction to her students. Which activity would best demonstrate a chemical reaction? placing a metal in acid to create a gas, measuring densities of water and ice, melting a solid piece of aluminum, or filling a balloon with helium gas?
What is placing a metal in acid to create a gas?
400
Which of the following are transferred or shared when two atoms react chemically? protons, neutrons, electrons, or photons?
What are electrons?
400
Which best describes alpha particles? they are attracted to negative electric fields, they are composed of beta particles, they are able to penetrate alpha particles, or they are products of chemical reactions?
What is they are attracted to negative electric fields?
500
Which of the following elements is an alkaline earth metal? Li, O, Ne, or Ca?
What is Ca?
500
How many neutrons are in an atom of Pu-246? 94, 150, 152, or 245?
What is 152?
500
What is the essential difference between the physical change and the chemical change of wax in a burning candle? the burning wax forms new compounds, while the melting of wax does not, a higher temperature is needed to burn wax than melt wax, melted wax can be separated into other substances, while solid wax cannot, or melted wax is a different phase of matter than solid wax?
What is the burning of wax forms new compounds, while the melting of wax does not?
500
What is the correct formula for when lithium and oxygen combine? LiO, Li2O, LiO2, or Li2O2
What is Li2O
500
What is one problem with using nuclear fission as an energy source? finding radioactive elements that have longer half-lives, finding ways of storing radioactive wastes, finding compounds to cool heated water, or finding nonradioactive elements for nuclear reactors?
What is finding ways of storing radioactive wastes?
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