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
daser333 [38]
3 years ago
8

Which missing item would complete this alpha decay reaction? 257/100 Fm= ________+4/2He

Chemistry
2 answers:
vampirchik [111]3 years ago
5 0

The technique here is to balance the number of particles which is the numerator and the number of protons which is the denominator

 

Therefore

NUMERATOR:

257 – 4 = 253

 

DENOMINATOR:

100 – 2 = 98

 the number of protons of an ion is simply its atomic number therefore, from the periodic table

98 = Californium

 

The answer here is that we will add an Isotope of californium, 253/98 Cf

maria [59]3 years ago
4 0

Answer: ₉₈²⁵³Cf

253 is a superscript to the left of the symbol, Cf, which represents the mass number, and 98 is a subscript to the left of the same symbol, which represents the atomic number.

Explanation:

1) The alpha decay equation shows that the isotope Fm - 257, whose nucleus has 100 protons and 157 neutrons, emitted an alpha particle (a nucleus with 2 protons and 2 neutrons).

2) Therefore:

i) the mass number decreased in 4, from 257 to 257 - 4 = 253.

2) the atomic number decreased in 2, from 100 to 100 - 2 = 98.

3) Hence the formed atom has atomic number 98, which is californium, Cf, and the isotope is californium - 253.

4) The item that completes the given alpha decay reaction is:

₉₈²⁵³ Cf.

5) The complete alfpha decay reaction is:

₁₀₀²⁵⁷ Fm → ₉₈²⁵³Cf + ₂⁴He

You can verify the mass balance:

257 = 253 + 4, and

100 = 98 + 2

You might be interested in
1)
Ludmilka [50]

ideal gas

PV=nRT

T = PV/nR

T = 1 x 12/9 x 0.08205

T = 16.25 K

4 0
2 years ago
When 3-methyl-3-pentanol is treated with chromic acid, Group of answer choices
san4es73 [151]

Answer: The orange color remains unchanged. (B)

Explanation:

7 0
3 years ago
Read 2 more answers
A common neutralization reaction, that is used in titrations, involves sodium hydroxide, NaOH, reacting with nitric acid, HNO3.
sertanlavr [38]
The  common  neutralization  reaction  that  involve  NaOH  reacting   with  HNO3  produces

NaNO3     and  H2O

The  equation  for  reaction  is      as folows
NaOH  + HNO3  =  NaNO3  +  H2O 
that  is  1  mole  of  NaOH  reacted  with  1  mole  of  HNO3  to  form  1  mole  of  NaNO3  and  1  mole  of  H2O
4 0
3 years ago
Read 2 more answers
A boy inflated a bunch of balloons while he was outside with an ambient temperature of 26oC. He then took the balloons inside hi
Strike441 [17]

Answer:

i think it would be 46C

Explanation:

3 0
3 years ago
Describe several main ideas in chemistry
12345 [234]
Matter.

A force of attraction that holds atom together 
<span>When atoms react they form a chemical bond which is defined as a force of attraction that holds atom together. A force of attraction is defined as a kind of force that draws two or more objects together regardless of distance. There are two major categories of forces of attraction, one is intramolecular and intermolecular. Intramolecular forces is the presence of forces in atoms internally. While intermolecular is the force by which the force that is existent in two or more elements. </span>
7 0
3 years ago
Other questions:
  • In a sample of liquid water (h2o), which property differs among the water molecules? number of hydrogen and oxygen atoms bond st
    13·2 answers
  • What types of energy can move through conductors
    8·1 answer
  • How many covalent bonds are there in a molecule of cyclohexane?
    9·1 answer
  • Organisms with traits that are well-suited to an environment tend to survive and reproduce at a greater rate than organisms that
    8·1 answer
  • Which condition applies when water boils at 100°c? air pressure equals a specific value (101.3 kpa) air pressure is less than it
    9·2 answers
  • PLEASE HELP!!!<br><br><br> Dhdjdhdjwjwnwisidjdnswnsjsjsksk
    14·1 answer
  • The Calvin cycle and the Krebs cycle are cycles of chemical reactions because they
    12·2 answers
  • the following punnett square shows a cross between two hybrid flowers. if the flowers show incomplete dominance, what fraction a
    15·2 answers
  • A 95.0 g sample of copper (Cp = 0.20 J/°C·g) is heated to 82.4°C and then placed in a container of water (Cp= 4.18 J/°C·g) at 22
    15·2 answers
  • How many moles of hydrogen atoms are there in one mole of (NH4)PMo12O40?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!