Homework/Review 2
Which electron sublevel follows the 4s sublevel according to increasing energy?
3d
State the number of valence electrons for each of the following elements: Sn.
4
What is the predicted ionic charge for a Pb ion?
4+
How many orbitals are in the 4p subshell?
4p
Predict the number of valence electrons for a Group VA/15 element.
5
How many neutrons are in the nucleus of an atom of Sn?
68
Element Z has two natural isotopes: Z-79 (78.918 amu) and Z-81 (80.916 amu). Calculate the atomic mass of element Z given the abundance of Z-81 is 49.31%.
79.90 amu
Which of the following groups of elements has the highest ionization energy?
Group VIIIA/18
What is the current official name for element 108? Hassium
Hassium
Where is the location of protons and neutrons in an atom?
Inside the nucleus
What is the term for the charge on an atom that has lost or gained electrons?
Ionic charge
Which of the following laws states that mass cannot be created or destroyed?
Law of conservation of mass
Which of the following remains constant for the reactants and products in a gaseous chemical reaction?
Mass
Which element has the following electron configuration: [Ar] 4s2 3d5?
Mn
What is the maximum number of electrons that can occupy an s energy sublevel?
2
If 2.43 g of magnesium burns in oxygen to produce 4.03 g of magnesium oxide, what is the mass of reacting oxygen gas?
1.60g
If 0.391 g of potassium metal reacts with 1.269 g of iodine, what is the mass of potassium iodide produced?
1.660g
If 0.391 g of potassium metal reacts with 1.269 g of iodine, what is the mass of potassium iodide produced? 1.660g
1.660g
What is the maximum number of electrons that can occupy a d energy sublevel?
10
What is the maximum number of electrons that can occupy an f energy sublevel?
14
Cyanocobalamin, C63H88CoN14O14P, is vitamin B12. What is the total number of atoms in the chemical formula of vitamin B12?
181
What is the electron configuration for an atom of fluorine?
1s2 2s2 2p5
What is the electron configuration for a sodium ion, Na+?
1s2 2s2 2p6
What is the electron configuration for an aluminum ion, Al3+?
1s2 2s2 2p6
What is the electron configuration for an atom of nickel?
1s2 2s2 2p6 3s2 3p6 4s2 3d8
What is the maximum number of electrons in a 4s orbital?
2
What is the term for the smallest particle that represents an element?
Atom
Which of the following is the electron dot formula for an atom of boron?
B with 3 dots
Which element has the following electron configuration: [Xe] 6s2?
Ba
Refer to a periodic table and predict which of the following is a liquid nonmetal at 25 °C and one atmosphere pressure.
Br
Which of the following groups has a predictable ionic charge of two positive?
Group IIA/2
Which of the following is an alkaline earth metal?
Ca
Which of the following is an example of a chemical change?
Charring sugar, cooking a steak, baking a pie, boiling an egg
Which of the following is separated into elements by a chemical method? Compound
Compound
What is the term for a pure substance that cannot be broken down any further by ordinary chemical reaction?
Element
Which of the following is an example of a chemical property?
Flammability Flammability
Which of the following subatomic particles are found inside the nucleus?
Neutron and proton
Which of the following is the electron dot formula for an atom of oxygen?
O with 6 dots
Which of the following is an example of a chemical change?
Oxidation
Which of the following is an example of a physical property?
Physical state, melting point, color, crystalline form
Refer to a periodic table and predict which of the following is a solid nonmetal under normal conditions.
Se
Which of the following is an example of a physical property?
Specific heat, appearance, hardness, boiling point
What term best describes the shape of an s orbital?
Sphere
Which element has the following electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10?
Zn
What is the term for the weighted average mass of all the naturally occurring isotopes of an element?
atomic mass
Which of the following is an example of a physical change?
evaporating ethyl alcohol
