
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 the number of neutrons and the number of protons.
b. Protons and neutrons have a positive charge and electrons have a negative charge.
c. Valence electrons are the electrons in the outermost shell of an atom.
d. 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 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.
c. The given statement is true.
d. 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 statements (a), and (c) are true, and statements, (b), and (d) are false.
Want to see more full solutions like this?
Chapter 2 Solutions
HUMAN ANATOMY+PHYSIOLOGY-PACKAGE
- Describe the levels of structural hierarchy for the human body, starting with the organismal level and ending with the chemical level. In addition, you should make sure you link each level to the previous level, emphasizing the structural relationships.arrow_forward9 S es Read the section "Investigating Life: In (Extremely) Cold Blood." Then, drag and drop the terms on the left to complete the concept map. Red blood cells Genes Icefishes -have mutated have colorless Oxygen have few lack encode Blood Cellular respiration consists of- contain carries is a Platelets White blood cells carries low amounts of Hemoglobin is necessary for Plasma Protein Reset.arrow_forwardPlating 50 microliters of a sample diluted by a factor of 10-6 produced 91 colonies. What was the originalcell density (CFU/ml) in the sample?arrow_forward
- Every tutor here has got this wrong, don't copy off them.arrow_forwardSuppose that the population from question #1 (data is in table below) is experiencing inbreeding depression (F=.25) (and no longer experiencing natural selection). Calculate the new expected genotype frequencies (f) in this population after one round of inbreeding. Please round to 3 decimal places. Genotype Adh Adh Number of Flies 595 Adh Adh 310 Adhs Adhs 95 Total 1000 fladh Adh- flAdn Adh fAdhs Adharrow_forwardWhich of the following best describes why it is difficult to develop antiviral drugs? Explain why. A. antiviral drugs are very difficult to develop andhave no side effects B. viruses are difficult to target because they usethe host cell’s enzymes and ribosomes tometabolize and replicate C. viruses are too small to be targeted by drugs D. viral infections usually clear up on their ownwith no problemsarrow_forward
- This question has 3 parts (A, B, & C), and is under the subject of Nutrition. Thank you!arrow_forwardThey got this question wrong the 2 previous times I uploaded it here, please make sure it's correvct this time.arrow_forwardThis question has multiple parts (A, B & C), and under the subject of Nutrition. Thank you!arrow_forward
- Calculate the CFU/ml of a urine sample if 138 E. coli colonies were counted on a Nutrient Agar Plate when0.5 mls were plated on the NA plate from a 10-9 dilution tube. You must highlight and express your answerin scientific notatioarrow_forwardDon't copy off the other answer if there is anyarrow_forwardAnswerarrow_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





