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Angelina_Jolie [31]
3 years ago
8

an alpha particle is identical to a). a neutron b) a helium nucleus c) an electron d) a hydrogen nucleus​

Chemistry
2 answers:
Kryger [21]3 years ago
6 0

Answer:

b) a helium nucleus

Explanation:

Alpha (α) particles are emissions from a radioactive nucleus, they occur when the nucleus loses 4 units of mass and 2 of atomic number.

They have less penetration than beta or gamma radiation and are composed of two protons and two neutrons, without electrons. That is why it has a +2 charge corresponding to the proton charge.  

He nuclei are composed of 2 protons and two neutrons. This is why alpha particles are identical to their nucleus.

The Helium present in the atmosphere is the product of the emission of alpha particles. For example from the Radon gas that is mostly present in soil, water and rocks.

ElenaW [278]3 years ago
3 0

Alpha particles, also called alpha ray or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a <u>helium-4 nucleus. </u>They are generally produced in the process of alpha decay, but may also be produced in other ways.

Composition: 2 protons, 2 neutrons

Mass: 6.644657230(82)×10−27 kg; 4.0015061...

Electric charge: +2 e

Symbol: α, α2+, He2+

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When non metals react with other elements and compounds what happens to their valence electrons?
DiKsa [7]

Answer:

d

Explanation:

they either gain valence electrons or share them depending on what elements or compound they are reacting with

5 0
2 years ago
In two or more complete sentences, compare singe displacements reactions and double displacement reactions
vodomira [7]

Answer:

The answer is in the explanation

Explanation:

Single displacement reactions: In these reactions, a more reactive element kicks out a less reactive element from a compound.

Ex.  Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)

In this example, Zn is more reactive than H, then Zn displaces H from the compound.

Double displacement reactions: In these kind of reactions 2 elements are displaced from the different compounds, these elements interchange positions.

Ex. CuCl2(aq) + 2 AgNO3(aq) → Cu(NO3)2(aq) + 2 AgCl(s)

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4 0
3 years ago
The distance between Earth and its moon is 384000000 meters. Express this distance in kilometers.
Andreyy89
384000000m

to change from m to km you just need to divide that give unit in Meters by 1000

which equals,
384000

so,

384000000 meters = 384000 kilometers
3 0
3 years ago
What is Δn for the following equation in relating Kc to Kp?2 SO2(g) + O2(g) ↔ 2 SO3(g)23-2-11
san4es73 [151]

Answer:

-1

Explanation:

The relation between Kp and Kc is given below:

K_p= K_c\times (RT)^{\Delta n}

Where,  

Kp is the pressure equilibrium constant

Kc is the molar equilibrium constant

R is gas constant

T is the temperature in Kelvins

Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants)

For the first equilibrium reaction:

2SO_2_{(g)}+O_2_{(g)}\rightleftharpoons2SO_3_{(g)}

<u>Δn = (2)-(2+1) = -1  </u>

Thus, Kp is:

K_p=  K_c\times (RT)^{-1}

4 0
3 years ago
Do the molecules in a desk have energy?
Harrizon [31]
Everything requires energy to move. If the desk is moving, then it has energy. 
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