1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ziro4ka [17]
3 years ago
10

Atom A has an atomic number of 19 and mass number of 40. Atom B has an atomic number of 20 and a mass number of 40. Which of the

se is an accurate statement?
A) Atom A has more protons than Atom B.
B) Atom A has one less proton and one more neutron than Atom B.
C) Atom A has an extra nucleon compared to Atom B.
D) Atom A has one more proton and one more electron than Atom B.
Biology
2 answers:
marin [14]3 years ago
8 0
<span>First, the atomic number is equal to the number of protons. Also, the mass number is protons plus neutrons, as electrons weigh so little that they are not included. So Atom A has 19 protrons and 21 neutrons, while Atom B has 20 protons and 20 neutrons. Answer A and B are not true because Atom A has 1 less proton than Atom B. Answer C is not correct because nucleons are either protons or neutrons, which both atoms have an equal number of, as they have a mass of 40. Therefore, the answer must be B.</span>
Marina CMI [18]3 years ago
5 0

Answer:

B) Atom A has one less proton and one more neutron than Atom B.

Explanation:

Atom A has the same mass but one less proton. So, Atom A has one less proton and one more neutron than Atom B.

You might be interested in
How do microscopes differ in magnification and resolution?
Verizon [17]

1.Magnification is the ability of optical instruments, such as a telescope or a microscope, to make an object bigger while resolution is the ability of optical instruments to produce images that are clearer, finer, and sharper.

2.Resolution is the power of an optical instrument to capture and produce more details of an image while magnification is the power of an instrument to create and produce a much larger image of an object.

3.Resolution can be expressed in arcsec or seconds while magnification can be expressed by a whole number and the letter “X.”

4.Although both are dependent upon each other, a high magnification does not always guarantee a high resolution.

5.Magnification allows us to see small objects, especially those that are not visible to the naked eye, while resolution allows us to see these objects more clearly and with more details.

6 0
3 years ago
A pharmaceutical company claims that it has developed a drug that will decrease the likelihood of seizures in patients with epil
Paraphin [41]

Answer:

B

Explanation:

This ensures that the research is corroborated by other scientists and is peer-reviewed hence increasing the veracity of the findings. This also ensures that conflict of interest is addressed whereby the findings by the company may appear to be compromised or biased because such a finding would be in favour of their own needs (such as financial gain).  Peer review in such case is  even more important because it involves humans subjects and ethics are paramount in healthcare research.

6 0
3 years ago
Read 2 more answers
Why is incomplete dominance considered an exception to Mendel's principles of inheritance?
topjm [15]

Incomplete dominance is considered to be an exception of Mendelian inheritance as neither of the alleles is completely dominant over another. The heterozygotes show the blending of traits and show a mix of both the phenotypes.
3 0
2 years ago
How is hemoglobin's affinity for oxygen affected by the presence or absence of oxygen? rank hemoglobin molecules with the descri
Leya [2.2K]
<h3><u>Answer;</u></h3>

In order from the most likely to bind an oxygen to least likely;

3 bound o2, po2=100mmhg1 bound o2, po2=100mmhg3 bound o2, po2=40mmhg1 bound o2, po2=40mmhg

<h3><u>Explanation;</u></h3>
  • Haemoglobin is more likely to bind oxygen if its other oxygen binding sites have already bound to an oxygen molecule.
  • The higher the partial pressure of oxygen in the blood also makes it more likely that the hemoglobin will bind oxygen.
8 0
3 years ago
Read 2 more answers
How do sand dunes move?
Dimas [21]
The answer is c hope this helped 
8 0
3 years ago
Read 2 more answers
Other questions:
  • According to the law of conservation of matter, in any food chain we know that
    6·2 answers
  • What substance can be formed through the ionic bonding of an anion and a cation
    8·2 answers
  • A person who has suffered damage to the cerebellum (located in the back of the brain) will probably have trouble with
    12·1 answer
  • Why hydra is aceolomate inspite of having body cavity?
    13·1 answer
  • Explain what the relationship between soils and acid deposition is?
    13·1 answer
  • Which of these sounds has the largest amplitude?
    5·1 answer
  • I’m finna fail if I don’t get answer please help
    7·2 answers
  • Recovering Ecosystems Worksheet Section 1: Select the Kitakami River region, the Abukuma Highlands, or Japan's coastal habitat a
    5·2 answers
  • Define the term tissue &amp; explain the concept of tissue culture.​
    6·1 answer
  • Genetic drift simulation: understanding evolution
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!