Chemistry Review - Unit 3 Atomic Theory and Nuclear
1.The symbol for the element potassium is
2.Al is the symbol for
3.How many protons, electrons, and neutrons, respectively, does 128Te have?
4.An atom with 17 protons and 18 neutrons is an atom of
5.How many protons, electrons, and neutrons, respectively, does 24Mg2+ have?
6.Isotopes of the same element have the same atomic number, but different ______and ______.
7.The atom with 73 neutrons and 55 protons has a mass number of
8.How many neutrons are contained in a bromine nucleus with a mass number of 78?
9.What are the isotopes of hydrogen?
10.How many electrons are present in a chlorine atom with a mass number of 35?
11.The atomic number of an atom refers to the number of ______in the nucleus.
12.An atom with 35protons has a mass number of 80. It must contain how many neutrons?
13.An atom with 47protons has a mass number of 106. The atom is
14.How many electrons are present in a chlorine, Cl, atom?
15.How many protons are in the nucleus of a Beryllium atom?
16.What is the ground state of an atom?
17.As the principal energy level increases in an atom's orbitals, what happens to the average distance of an electron energy level from the nucleus?
18.What is the maximum number of electrons that a p-orbital can hold?
19.A given set of d orbitals consists of _____ orbital(s).
20.The maximum number of electrons allowed in each of the f orbitals is
21.Ans sublevel can hold a maximum of
22.The maximum number of electrons allowed in the third energy level is
23.Magnesium has how many electrons in its outermost principal energy level?
- The electron configuration for the sulfur atom is
25.1s22s22p63s23p1 is the correct electron configuration for which atom?
26.The noble gases contain how many valence electrons?
27.Which elements have the largest number of electrons in the valence shell?
28.How many d electrons are there in a nickel atom?
29.1s22s22p63s23p64s23d3 is the electron configuration for which atom?
- The electron configuration for manganese is
31.The element with the electron configuration [Kr]5s24d105p3 is
32.Astatine is a naturally radioactive element decaying with the loss of an alpha particle
As-211 --> He+2-4
What is the other product of this decay?
33.Pa-234 undergoes beta particle production. What is the other product?
34.Alpha particles are
35.The atomic particle having a mass of 1 amu and a charge of 1- is
- The cesium-131 nuclide has a half-life of 15 years. After 30 years, about 10 g remain. The original mass of the cesium-131 sample is what?
37.When the palladium-106 nucleus is struck with an alpha particle (above), a proton is produced along with a new element. What is this new element?
38.Write the noble gas abbreviated electron configuration for I.
39.Write the electron configuration for Si.
40.Complete the table for these radioactive particles:
Name Charge Mass Number
Alpha
Beta
Gamma