To review:
Whether the following statements are true or false. False statements are to be corrected.
a. The mass number of an atom is the sum of its neutrons and the protons.
b. Electrons travel in orderly, circular orbits around the nucleus.
c. Protons and neutrons have a positive charge and the electrons have a negative charge.
d. Valence electrons are the electrons in the outermost shell of an atom.
e. Every element has a characteristic number of protons which is called the element's mass number.
Introduction:
The matter is basically defined as anything which has the mass and also occupies the space. It is widely studied in chemistry which is basically the study of matter and its interactions with the surrounding. The matter is made up of atoms and hence, atoms are known to be the tiniest unit of the matter which retains its original traits.
Explanation of Solution
a. The given statement is true. Mass number refers to the total numbers of neutrons and protons found within the nucleus of an atom. This value is important in determining the atomic mass of atoms.
b. The given statement is true. Electrons revolve around the atomic nucleus and are known to be tiny and negatively charged particles. An atom looks like a miniature solar system, according to the classical atomic model, with the electrons moving in the circular orbits around the nucleus.
c. The given statement is false. Protons are positively charged, electrons are negatively charged, and neutrons do not have any charge. The charge on a proton and that on an electron are identical in terms of magnitude, but are opposite.
d. The given statement is true.
e. The given statement is false. The mass number of an element is the total number of neutrons and protons found in the atom.
Thus, it can be concluded that the statements (a), (b), and (d)aretrue and statements, (c), and (e) is false.
Want to see more full solutions like this?
Chapter 2 Solutions
EBK HUMAN ANATOMY & PHYSIOLOGY
- How is a protein destined for the Endoplasmic Reticulum (ER), imported into the ER? Be concise.arrow_forwardFind out about the organisations and the movements aimed at the conservation of our natural resources. Eg Chipko movement and Greenpeace. Make a project report on such an organisation.arrow_forwardWhat are biofertilizers and mention the significancearrow_forward
- PCBs and River Otters: Otters in Washington State’s Green-Duwamish River have high levels of polychlorinated biphenyls (PCBs) in their livers. PCBs can bind to the estrogen receptors in animals and disrupt the endocrine system of these otters. The PCBs seem to increase the estrogen to androgen ratio, skewing the ratio toward too much estrogen. How would increased estrogen affect the river otter population? Based on your reading of the materials in this unit, what factors can affect fertility in humans? Explain how each of the factors affecting human fertility that you described can disrupt the human endocrine system to affect reproduction.arrow_forwardOther than oil and alcohol, are there other liquids you could compare to water (that are liquid at room temperature)? How is water unique compared to these other liquids? What follow-up experiment would you like to do, and how would you relate it to your life?arrow_forwardSelection of Traits What adaptations do scavengers have for locating and feeding on prey? What adaptations do predators have for capturing and consuming prey?arrow_forward
- Competition Between Species What natural processes limit populations from growing too large? What are some resources organisms can compete over in their natural habitat?arrow_forwardSpecies Interactions Explain how predators, prey and scavengers interact. Explain whether predators and scavengers are necessary or beneficial for an ecosystem.arrow_forwardmagine that you are conducting research on fruit type and seed dispersal. You submitted a paper to a peer-reviewed journal that addresses the factors that impact fruit type and seed dispersal mechanisms in plants of Central America. The editor of the journal communicates that your paper may be published if you make ‘minor revisions’ to the document. Describe two characteristics that you would expect in seeds that are dispersed by the wind. Contrast this with what you would expect for seeds that are gathered, buried or eaten by animals, and explain why they are different. (Editor’s note: Providing this information in your discussion will help readers to consider the significance of the research).arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education