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You know that you have a balanced chemical equation when the                                                                                                          .
1. coefficients of the reactants equal the coefficients of the products
2. number of atoms of each element in the reactants equal that of each corresponding element in the products
3. products and reactants are the same chemicals
4. subscripts of the reactants equal the subscripts of the products
Based on the Law of Conservation of Mass, we know that the mass of the reactants                                                                            .
1. always be more than the total mass of the products
2. always be less than the total mass of the products
3. sometimes be more and sometimes be less than the total mass of the products
4. always be equal to the total mass of the products
Grade 11 Periodic Table and Elements
Ionization energy trends                                                             .
1. becomes greater up and to the right of the periodic table.
2. becomes greater up and to the left of the periodic table.
3. becomes greater down and to the right of the periodic table.
4. becomes greater down and to the left of the periodic table.
Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?
1. Hund’s Rule
2. Pauli Exclusion Principle
3. Aufbau Principle
4. None of the above
Grade 11 Periodic Table and Elements
In the Bohr model,                                                            .
1. the electrons stay in place
2. the elections travel around the nucleus in an oval orbit
3. the electrons travel around the nucleus in a circular orbit
4. the electrons move side to side around the nucleus
5. none of the above
Which chemical equation correctly represents photosynthesis?
1. $H_2O + CO_2 + sunlight rarr O_2 + "glucose"$
2. $H_2O + O_2 + sunlight rarr CO_2 + "glucose"$
3. $O_2 + "glucose" rarr H_2O + CO_2 + "energy"$
4. $CO_2 + "glucose" rarr H_2O + O_2 + "energy"$
Grade 11 Periodic Table and Elements
In which family is an element in Group 16, Period 4 found?
1. The Halogen Family
2. The Oxygen Family
3. The Nitrogen Family
This expresses the concentration of H+.
1. Acid
2. Base
3. pH scale
4. Neutralization
In chemistry, we describe an atom as
1. the tiniest unit of matter that keeps its characteristic chemical identity.
2. the simplest unit of a compound.
3. always being made up of carbon.
4. being smaller than an electron.
In chemistry, we describe a mixture as
1. a combination of pure substances formed through chemical bonding.
2. any substance possessing a uniform composition throughout.
3. a physical combination of two or more types of substances,with each maintaining its own characteristic properties.
4. any collection of elements chemically bound to each other.
Which of the following represents a correct chemical formula for copper (II) nitrate?
1. $Cu_2NO_3$
2. $Cu(NO_3)_2$
3. $Cu_3N_2$
4. $CuN$