Why is the mass number for each element on the periodic table is not a whole number?

Why is the mass number for each element on the periodic table is not a whole...
Element 107 in the periodic table is Bh. Determine the atomic number of the element just below Bh in the periodic table. atomic number: _______
1) The place of an element in the periodic table is determined by its ... ? A) mass number B) density C) atomic numbed D) atomic mass 2) We obtain energy from the sun by A) molecular travel B) conduction C) convection D) radiation
64Chapter 7 Atomic Number and Atomie Mass The Periodie Table of Elements contains th and atomie wumber of protons, e atomic m number of each element. These numbbers indicate the neutrons, and electrons in each element's basic wtructure Each aquare in the Periodic Table represents an element There are two numbers in each square 3 Alomic Number The smaller number at the top of the box is the atomic number The number at the bottom of the box is the...
Choose an element in the periodic table and answer the following questions 1. Name of the element 2. Element Characteristics 3. Atomic Number 4. Atomic Mass 5. Where this element can be found? 6. What minerals is composed of this element? 7. What is the minerals used for? 8. Picture of this element
Select the element with atomic number 17 of the group and two elements of The periodic table one of them has the atomic number 20 and the other element has the atomic number 6 to form two compounds and state the name and type of each compound
periodic table with full electronic configuration of each element .clearly describe please
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Name the element in the second period of the periodic table with 5 valence electrons. element name: Name the element in the third period of the periodic table with six 3p electrons. element name: Name the element in the fourth period of the periodic table with two 4p electrons. element name: Name the element in the third period of the periodic table with 6 valence electrons. element name:
14. Using the periodic table, write the name and symbol of the element with the following atomic number: a. Z-28 b. Z= 13 c. Z-88 d. Z-33 e. Z- 50 15. Complete the following table for the three naturally occurring isotopes of silicon, the major component in computer chips: Atomic Number Mass Number Number of Protons Number of Neutrons Number of Electrons 16. Write the electron arrangement for each of the following elements and determine group and period. а. охудen...
using the periodic table, write a alpha, beta, or positron decay of any element. When writing an element, use the superscript and subscript text to add in atomic mass and nuclear charge for each element. use the dash and greater then symbol for the reaction arrow.
Suppose you are trying to construct a periodic table in an alternate universe. You discover element "X", which has two isotopes. Isotope #1 has a mass of 14.02 amu and an abundance of 29.5%. Isotope #2 has a mass of 15.02 amu. What atomic mass would you put on the periodic table for element "X"? Please show all working out and neat hand writing please. Thank you.