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
yan [13]
3 years ago
13

How many neutrons are in the radioactive isotope 40/19? A. 40 B. 19 C. 21 D. 20

Chemistry
2 answers:
nydimaria [60]3 years ago
7 0

The answer to this question is B 19

Olin [163]3 years ago
5 0
The answer is B. 19 <span>✔

Its 19 because h</span><span> (atomic mass is4.02643(11) u) contains one proton and three </span>neutrons<span> in its nucleus. It is a highly unstable </span>isotope<span> of hydrogen. It has been synthesised in the laboratory by bombarding tritium with fast-moving deuterium nuclei.</span>
You might be interested in
why are the theoretical density values of brass, bronze, and steel reported as a range of densities? how can you categorize thes
Julli [10]

<u>Answer:</u>

<em>Theoretical density values  </em>

  • brass- 8.4-8.73 gm/cm^3
  • bronze- 8.73 g/cm^3
  • steel- 7.75 - 8.05 gm/cm^3

<u>Explanation:</u>

All of these substances are<em> </em>alloys (a substance made from melting two or more substances, one of them usually being a metal). Brass is a combination of copper and zinc, bronze is mostly copper, tin and other non-metals as well and steel is majorly made up of iron and copper. These alloys have various uses and varying importance in different kinds of industries.

6 0
3 years ago
Consider the diagram of the Earth, Sun, and Moon system. Which phenomenon is MOST DIRECTLY caused by the revolution of the Earth
zlopas [31]
It is commonly known that our Galaxy rotates upon the sun because of gravity. The diagrams' arrows sort of describe it. Id suggest Gravity as the answer.

5 0
3 years ago
HELP ASAP
xenn [34]

Answer:

Option A) oxygen

Explanation:

Oxygen gas it the electrolysis of an aqueous solution of sodium nitrate which a gas forms at anode it is called the oxygen gas

<em><u>maybe </u></em><em><u>this </u></em><em><u>answer</u></em><em><u> might</u></em><em><u> help</u></em><em><u> u</u></em><em><u> out</u></em>

3 0
3 years ago
Read 2 more answers
Q
UNO [17]
Nucleus

Because that’s where all the chemical cell activity decisions take place
5 0
3 years ago
Nickel(ii) chloride dissolves in water to form a light green solution. what ions are present in solution—that is, what is "swimm
ArbitrLikvidat [17]

Hello!

The ions that are present in solution are Ni⁺²(aq) and Cl⁻(aq)

Why?

When an ionic substance like Nickel Chloride (NiCl₂) dissolves in water, it dissociates into the individual ions that form the substance. Water molecules surround then the individual ions in a process called solvation.

It can be represented in the following chemical equation:

NiCl₂(s) → Ni⁺²(aq) + 2Cl⁻(aq)

Have a nice day!

7 0
3 years ago
Other questions:
  • Carbon dioxide emissions will____in the next century and global temperatures will ____.
    7·1 answer
  • What will most likely happen in the absence of a vacuole?
    5·1 answer
  • Which equation represents the total ionic equation for the reaction of HNO3 and NaOH? Upper H superscript plus, plus upper O upp
    13·2 answers
  • Venn diagram compare and contrast cotton balls and pine cones
    12·2 answers
  • It's about coronovirus ​
    6·2 answers
  • Convert: 65 kg to mg<br> 65,000 mg<br> O 65,000,000 mg<br> O 65 mg
    10·2 answers
  • A gas mixture with a total pressure of 745 mmHg contains each of the following gases at the indicated partial pressures: CO2, 12
    15·1 answer
  • A sample of CO2 has a volume of 6.08 cm3 at 2.0 atm. At what pressure would this sample of gas have a volume of 42.0 cm?
    12·1 answer
  • Write a conclusion statement that addresses the following questions:
    5·1 answer
  • Which of the following will have the greatest proportion by mass of nitrogen?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!