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3 years ago

In beta decay, what is emitted? A. an electron B. a helium-4 atom C. a neutron D. a photon E. a radionucleus

Chemistry

2 answers:

myrzilka [38]3 years ago

4 0

Answer: A. an electron

<u>Beta particles are electrons or positrons (electrons with positive electric charge or antielectrons).</u> Beta decay is a type of radioactive decay in which a beta ray is emitted from an atomic nucleus.

<u>Beta decay occurs when, in an unstable nucleus with too many protons or too many neutrons, one of the protons or neutrons transforms into the other.</u> In beta minus decay, a neutron is broken down into a proton, an electron, and an antineutrino (the neutrino antiparticle, meaning it has an opposite charge to the neutrino). In beta decay plus, a prototype breaks down into a neutron, a positron and a neutrino.

Step2247 [10]3 years ago

4 0

Answer:

A an electron

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Ksivusya [100]

Answer:

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Explanation:

Can be positive (meaning more protons than electrons) and it can be negatively charged (meaning there are more electrons than protons).

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3 years ago

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Predict the formula for ba 2 and s-2.

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3 years ago

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A pure titanium cube has an edge length of 2.84 in how many titanium atoms does it contain? titanium has a density of 4.50g/cm3.

rjkz [21]

There are $2.12 \times 10^{25}$ titantium atoms in the cube.

<h3>Further Explanation</h3>

This problem involves unit conversion and mole conversion. The steps are:

Convert the length of the cube from inches to centimeter since the density is given in g/cm³.
Determine the mass of the cube using the given density.
Convert the mass of the cube to number of atoms using Avogadro's number.

<u>STEP 1. </u>Converting inches to cm

$length \ in \ cm \ = 2.84 \ in \times (\frac{2.54 \ cm}{1 \ in})\\\boxed {length \ in \ cm \ = 7.2136 \ cm}$

<u>STEP 2:</u> Determining mass of cube from the density

$density = \frac{mass}{volume}\\mass = density \times \ volume\\\\mass \ = 4.50 \frac{g}{cm^3} \times (7.2136 \ cm)^3\\\boxed {mass \ = 1689.15 \ g}$

<u>STEP 3:</u> Converting mass of titanium cube to number of atoms

$no. \ of \ Ti \ atoms = 1689.15 \ g \ Ti \times (\frac{1 \ mol \ Ti}{47.867 \ g})(\frac{6.022 \times 10^{23} \ Ti \ atoms}{1 \ mol \ Ti}) \\\\\boxed {no. \ of \ Ti \ atoms = 2.125 \times 10^{25} \ atoms}$

Since the given values have 3 significant figures, the final answer must be:

$\boxed {\boxed {no. \ of \ atoms \ = 2.12 \times 10^{25} \ Ti \ atoms}}$

<h3>Learn More</h3>

Mole Conversions brainly.com/question/12980009
Stoichiometry brainly.com/question/10513747
Dimensional Analysis brainly.com/question/1594497

Keywords: Avogadro's number

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3 years ago

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The model of the atom has changed as scientists have gathered new evidence. Four models of the atom are shown below, but one imp

nadya68 [22]

Answer:

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3 years ago

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Write symbol equations for the reactions that occur when these pairs react:

timurjin [86]

Answer:

Explanation:

word equation:

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