Periodic Table Assignment
How many neutrons does an atom of tungsten have? Round your answer to the nearest whole number.
110
Which group number is aluminum in?
13
The atomic number of cesium (Cs) is 55. If an atom of cesium has 78 neutrons, what is the atomic mass of cesium?
133
Which period number is aluminum?
3
How many electrons are in an atom of tin?
50
How many protons are in an atom of tin?
50
How many neutrons are in an atom of tin? Round your answer to the nearest whole number.
69
Name the three general categories into which the elements are divided.
The elements of the periodic table fall into three general categories - metals, nonmetals, and metalloids.
Which statements accurately describe Dmitri Mendeleev's contributions to the development of the periodic table? Check all that apply.
b d
Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass?
c
Which statement accurately compares the trends in atomic number and atomic mass in the periodic table?
c
Use the drop-down menu to complete the statement.
valence electrons
