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
katrin2010 [14]
2 years ago
15

Iodine 131, cesium 137, and strontium 90 are all considered isotopes. What are isotopes?

Chemistry
2 answers:
Nitella [24]2 years ago
3 0

Answer:

Isotopes are variants of an element, where the number of neutrons is different but its number of protons stay the same.

Explanation:

If the number of protons had changed then it would just be a different element.

Electron number changing simply adds charge to the atom, and doesn't change it or anything.

PLS GIVE BRAINLIEST

Fudgin [204]2 years ago
3 0

Answer:

Isotopes are one of two or more forms of the same chemical element.

Explanation:

Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number,but a different number of neutrons giving each element isotope of a different atomic weight.

You might be interested in
As a pendulum swings from its highest to its lowest position along an arc, what happens to its kinetic energy and potential ener
lara31 [8.8K]

C.

Explanation:

As a pendulum swings from its highest to its lowest position along an arc, what happens to its kinetic energy and potential energy? The potential energy decreases while the kinetic energy increases.

4 0
2 years ago
Which of the following best accounts for the difference in mutagenic activity between PAHs and PAHs plus liver preparation?
guapka [62]

Answer: C

Explanation:

Some poly nuclear aromatic hydrocarbons are not carcinogenic in themselves. However, when these are made to interact with living cells, enzymes in the cells could convert the polynuclear aromatic hydrocarbon into a carcinogenic material such as benzo-[a]-pyrene. This can now interact adversely with the deoxyribonucleic acid of living cells leading to genetic mutation, that is, irreversible changes in the genes of organisms.

7 0
3 years ago
1. The water cycle is nature's way of _______________water.
stellarik [79]
Regenerating is the answer
6 0
3 years ago
Who has a higher frequency X-ray or, radio waves?
tester [92]

Answer:

radio waves

Explanation:

6 0
2 years ago
Please this is important
ValentinkaMS [17]

Answer:

Explanation:

2)

2C6H6 + 9O2 -> 12CO2 + 6H20

Weight of a CO2 Mol 12+ 16x2 = 44g

In 100g number of moles = 100/44= 2.2727 Moles

Number of C6H6 2moles burned when creating 12 moles of CO2

Therefore 2.2727/12 x 2 = 0.3787

3)  

3H2SO4 + 2Al(OH)3 -> Al2(SO4)3 + 6H2O

H2O weight of a 1mol is = 2+16 = 18g

2moles of Al(OH)3 cerates 6 moles of water.

3moles of sulfuric creates 6 moles of water.

5.5moles Al(OH)3 reacts with 5.5 moles of sulfuric

Therefore number of water moles = 5.5/3 x 6 = 11moles

Weight water = 11 x 18 = 198g

4)  

Cu + 2AgNO3 -> 2Ag + Cu(NO3)2

1mol of Cu produces 2moles of silver

Ag = 107.86 g/Mol

Cu = 63.54 g/Mol

In 26g Ag number of moles = (26/107.86)/2 x 63.54 = 7.658g

5)

3K2CrO4 + 2AlPO4 -> 2K3PO4 + Al2(CrO4)3

K2CrO4 = 39x2 + 52 + 16x4 = 194g/Mol

Al2(CrO4)3 = 54 + 354 = 408g/Mol

3moles of K2CrO4 creates 1mol of Al2(CrO4)3

Therefore weight of the Al2(CrO4)3 produced by 17.5g potassium chromate

(17.5/194)/3 moles of Al2(CrO4)3 produced  = 0.03moles

Al2(CrO4)3 produced = 0.03 x 408 = 12.26g

7 0
2 years ago
Other questions:
  • 1. When 400 J of heat is added to 5.6 g of olive oil at 23*C, the temperature increases to 87*C. What is the specific heat of th
    15·1 answer
  • Please help will reward brainliest
    14·1 answer
  • Ce cantitate de O se gaseste in 5,8 g hidroxid de magneziu
    15·1 answer
  • The stomach and intestines are organs of the body system which _______.
    6·2 answers
  • water has a specific heat of 4.18 j/gK and a molar heat of vaporization of 40.7 kJ. Calculate the minimum amount of heat necessa
    8·1 answer
  • Fill missing reagents.
    10·1 answer
  • The cycling of carbon between the living and non-living parts of the Earth system is an important result of which of the followi
    13·1 answer
  • An analytical chemist is titrating 181.2 mL of a 0.09000M solution of diethylamine ((CH) NH) with a 0.5400M solution of HNO3. Th
    8·1 answer
  • True or false; when something heats up, New energy is created, and when something cool down, Energy is destroyed.
    9·1 answer
  • Can someone help me with this please?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!