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
Papessa [141]
3 years ago
6

What is the change in atomic mass when an atom emits an alpha particle? A. decreases by 2 B. decreases by 1 C. decreases by 4 D.

remains the same
Chemistry
1 answer:
Misha Larkins [42]3 years ago
7 0
Answer is "C"

alpha decay is an emission of ₂⁴He nucleus. If an element undergoes an alpha decay, the mass of the daughter nucleus formed is reduced by 4 compared to mass of parent atom and atomic number is reduced by 2 compared to atomic number of parent atom.
You might be interested in
2. The temperature of a gas is increased from 125⁰C to 182⁰C inside of a rigid container. The original pressure of the gas was 1
Lina20 [59]

P1/T1 = P2/T2

125⁰C = 398.15 k

182⁰C = 455.15 k

1.22/398.15 = p2/455.15


p2= 1.39atm

the pressure of the gas be after the temperature change is 1.39 atm

7 0
3 years ago
Read 2 more answers
What at the three different variables in density?
tatyana61 [14]

Answer:Independent, dependent, and controlled variables.

Explanation:

8 0
2 years ago
How long does it take for only one eighth of a sample of radon-222 to remain
Alex17521 [72]
1/8=(1/2)^3 and the half life of radon is 3.8days

Half life is the time it takes for half of any amount of a radioactive substance to decay into something else.

Therefore for a sample of radon to decay to 1/8 of its original amount, it would take 3 x 3.8days=11.4 days
4 0
3 years ago
A sample of krypton gas in a container of volume 1.90 L exerts a pressure of 0.553 atm at 21 Celsius. How many moles of gas are
NeTakaya

Explanation:

pv = nRT

n= PV/RT

n =0.553×1.90/0.0821×294

n=1.0507/24.1374

n=0.0435mol

3 0
3 years ago
Read 2 more answers
Landslides and slumps are forms of ?
masha68 [24]
Landslides and slumps are forms of mass movements. Types of erosion both move, in different ways. In slumps, land breaks off in one piece, or chunk. Landslides are when rocks and dirt rapidly move down a slide.
5 0
3 years ago
Other questions:
  • What color is the 2,6-dichloroindophenol solution in acidic solutions?
    9·1 answer
  • 1.
    7·2 answers
  • In order for methane to be recycled it has to phase change, is that possible on Titan Moon? ONLY IF YOU REALLY KNOW PLEASE❤️
    9·1 answer
  • The structure of 3-propylpentane is best described as
    9·2 answers
  • What is metal ? Where does it coke from ?
    6·2 answers
  • The synthesization of new carbon compounds is studied in<br> chemistry.
    9·1 answer
  • Ali says the climate of a town is rainy because it is raining outside today. Is she correct? In one or two sentences, explain wh
    8·1 answer
  • How many kPa are in 2,150 mmHg?<br> 2.83 kPa<br> 287 kPa<br> 1.61 ´ 104 kPa<br> 2.18 ´ 105 kPa
    5·2 answers
  • Multiple choice-- please help!
    9·1 answer
  • 1. What is the scientific methed?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!