Visit this website (http://openstaxcollege.org/l/ptable) to view the periodic table. In the periodic table of the elements, elements in a single column have the same number of electrons that can participate in a
To analyze:
The meaning of mass number based on the given information.
Introduction:
Each element in the periodic table has a specific atomic number which is equal to the number of protons present in it. Each element also has a mass number which is equal to the total of a number of protons and neutrons.
Answer to Problem 1ILQ
The meaning of mass number shown in the parentheses is that the mass number of an element is the total number of neutrons and protons present in the nucleus of the atom.
Explanation of Solution
Given information:
The elements present in one column of the periodic table has the same number of electrons in the outermost shell or valence shell. These electrons can participate in the chemical reaction by donating, accepting or sharing of electrons.
The atom of an element has an equal number of protons and electrons but the number of electrons can change when the atom donates or accepts an electron in a chemical reaction to achieve the noble gas electronic configuration. The number of neutrons is fixed for an atom of the element. So, the mass number of an element is calculated by the total of a number of protons and the neutrons which are present in the nucleus of the atom.
The mass number is equal to the total number of protons and neutrons in the nucleus of the atom.
Want to see more full solutions like this?
Chapter 2 Solutions
Anatomy & Physiology
Additional Science Textbook Solutions
College Physics
Essentials of Genetics (9th Edition) - Standalone book
Campbell Essential Biology (7th Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
Anatomy & Physiology
Human Biology: Concepts and Current Issues (8th Edition)
- Magnesium has an atomic number of 12. Which of the following statements is true of a neutral magnesium atom? a. It has 12 protons, 12 electrons, and 12 neutrons. b. It has 12 protons, 12 electrons, and six neutrons. c. It has six protons, six electrons, and no neutrons. d. It has six protons, six electrons, and six neutrons.arrow_forwardPolonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. For example, they can be stopped by a single sheet of paper or a few inches of air. That is one reason that authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po become after it emits an alpha particle?arrow_forwardIodine has 37 known isotopes. Therefore, the atomic mass has a range of 108-144 amu. Which of the following statements concerning iodine is correct? A) The isotopes of iodine have between 55 and 91 protons. B) An atom of iodine can have between 55 and 91 neutrons. C) The isotopes of iodine will always have the same number of neutrons, but the protons can vary. D) The isotopes of iodine have between 108 and 144 neutrons, but the number of protons will not vary.arrow_forward
- Which of the following levels in the shell model of an atom can hold up to two electrons? A. The second shell B. The first shell C. The third shellarrow_forwardA chemical species with an unpaired electron is called a_____________.arrow_forwardfor the first 10 atoms from the periodic table determine: the atom full name and chemical symbol atomic number atomic mass how many protons, Neutrons and electrons? Abundance in naturearrow_forward
- Chlorine is an element with the symbol Cl. Draw and label atomic structure of chlorine indicating the number and locations of protons, neutrons and electrons in one atom of chlorine.arrow_forwardThe atomic number of an atom is determined by the number of in the atom. (a) protons (b) neutrons (c) electrons (d) electrons plus neutrons plus protonsarrow_forwardArrange the elements Na, Si, and S in the order of(a) decreasing atomic radius.(h)increasing first ionization energy.arrow_forward
- A carbon atom contains six protons and six neutrons.A. What are its atomic number and atomic weight?B. How many electrons does it have?C. How many additional electrons must it add to fill its outermost shell? How does this affect carbon’s chemical behavior?D. Carbon with an atomic weight of 14 is radioactive. How does it differ in structure from nonradioactive carbon? How does this difference affect its chemical behavior?arrow_forwardAtoms of the same element that differ only in the number of neutrons are known asarrow_forwardChoose an element from the periodic table that is found in the human body, and write five sentences about some of its functions in the body.arrow_forward
- Anatomy & PhysiologyBiologyISBN:9781938168130Author:Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark WomblePublisher:OpenStax CollegeConcepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeBiology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning