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
shutvik [7]
3 years ago
7

Atoms whose atomic number are the same but whose mass numbers are different are called: alpha particles ions beta particles isot

opes
Chemistry
1 answer:
Kaylis [27]3 years ago
8 0
<h2>Atoms whose atomic number are the same but whose mass numbers are different are called : Isotopes </h2>

Explanation:

Isotopes

They are the   elements with same atomic number but different mass number .

for example : Protium , deuterium and tritium are isotopes of hydrogen .

                    : C-14 and C-12 are isotopes of oxygen .

                     : Cl-35.5 and Cl-37 are isotopes of chlorine

Alpha particles

They are helium nuclei with +2 unit charge and 4 a.m.u mass

They are represented as : He₂⁴.

Ions

The atom carrying charge is called as ion .

It can be of two types : Cation and anion

cation :atom with positive charge

Anion : atom with negative charge

Beta particles

They are actually particles with charge and mass of electron and is represented as :₀ e⁻¹

You might be interested in
Which series reveals the source of energy for oil? please help ASAP!!! WILL MARK BRAINLEST
Murrr4er [49]

Answer:

B

Explanation:

Oil > Animals > Plants > Chemicals

5 0
2 years ago
Read 2 more answers
Naturally occurring element X exists in three isotopic forms: X-28 (27.979 amu, 92.21% abundance), X-29 (28.976 amu 4.70% abunda
bezimeni [28]

<u>Answer:</u> The average atomic mass of X is 28.09 amu

<u>Explanation:</u>

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i .....(1)

  • <u>For isotope 1:</u>

Mass of isotope 1 = 27.979 amu

Percentage abundance of isotope 1 = 92.21 %

Fractional abundance of isotope 1 = 0.9212

  • <u>For isotope 2:</u>

Mass of isotope 2 = 28.976 amu

Percentage abundance of isotope 2 = 4.70 %

Fractional abundance of isotope 2 = 0.0470

  • <u>For isotope 3:</u>

Mass of isotope 3 = 29.974 amu

Percentage abundance of isotope 3 = 3.09 %

Fractional abundance of isotope 3 = 0.0309

Putting values in equation 1, we get:

\text{Average atomic mass of X}=[(27.979\times 0.9212)+(28.976\times 0.0470)+(29.974\times 0.0309)]

\text{Average atomic mass of X}=28.09amu

Hence, the average atomic mass of X is 28.09 amu

4 0
3 years ago
Which statement is a valid conclusion about the activation energy of the reverse reaction if the forward reaction is exothermic?
babunello [35]

Answer:

e) The activation energy of the reverse reaction is greater than that of the forward reaction.

Explanation:

  • Activation energy is the minimum amount of energy that is required by the reactants to start a reaction.
  • An exothermic reaction is a reaction that releases heat energy to the surrounding while an endothermic reactions is a reaction that absorbs heat from the surrounding.
  • <em><u>In reversible reactions, when the forward reaction is exothermic it means the reverse reaction will be endothermic, therefore the reverse reaction will have a higher activation energy than the forward reaction.</u></em> The activation energy of the reverse reaction will be the sum of the enthalpy and the activation energy of the forward reaction.
4 0
3 years ago
Heavy nuclides with too few neutrons to be in the band of stability are most likely to decay by what mode?
Margarita [4]

Answer:

Positron emission

Explanation:

Positron emission involves the conversion of a proton to a neutron. This process increases the mass number of the daughter nucleus by 1 while its atomic number remains the same. The new neutron increases the number of neutrons present in the daughter nucleus hence the process increases the N/P ratio.

A positron is usually ejected in the process together with an anti-neutrino to balance the spins.

6 0
3 years ago
why are experimental investigations the best type of scientific investigation to demonstrate cause and effect relationships
Lelu [443]
Because they are coming from the ground and always safe
8 0
3 years ago
Read 2 more answers
Other questions:
  • What does the octet rule state that explains why atoms bond
    9·2 answers
  • A room is 16 ft x 12 ft x 12 ft. would air enter or leave the room if the temperature changed from 27°c to –3°c while the pressu
    6·1 answer
  • When does the cell membrane dissapear
    8·1 answer
  • A hydrate of copper (II) chloride has the following formula: CuCl2 - x H2O. The water in a 3.41-g sample of the hydrate was driv
    5·1 answer
  • How many protons does a neutral nitrogen atom have
    12·1 answer
  • A variable that is not being directly tested during an experiment should be ____.
    14·1 answer
  • Bases have which of the following
    7·1 answer
  • When a crystal of sugar dissolves in water, what happens to the entropy?
    14·1 answer
  • Me ayudan xfa, doy corona :)
    7·1 answer
  • In the chemical formula below, how many H atoms are present?<br> SNH4OH
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!