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3 years ago

Americium-241 decays into neptunium-237. Which correctly describes this process of radioactive decay?

2 answers:

4 0

The best and most correct answer among the choices provided by your question is the first choice which is "An unstable nucleus decays into a more stable nucleus."

Radioactive decay (also known as nuclear decay or radioactivity) is the process by which the nucleus of an unstable atom loses energy by emitting radiation, including alpha particles, beta particles, gamma rays, and conversion electrons. A material that spontaneously emits such radiation is considered radioactive.

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Sedaia [141]3 years ago

3 0

Answer:

A. An unstable nucleus decays into a more stable nucleus.

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Name the subatomic particles contained in the nucleus of the atom

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Neutron, proton
form those are both quarks

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How do atomic mass and atomic number change across and dow the periodic table of elements?

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4 years ago

How many atoms are present in a sample of Potassium (K) weighing 33.49g?

madam [21]

Answer:

5.158 × 10²³ atoms K

General Formulas and Concepts:

Chemistry - Atomic Structure

Reading a Periodic Table
Using Dimensional Analysis
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Explanation:

Step 1: Define

33.49 g K

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of K - 39.10 g/mol

Step 3: Convert

$33.49 \ g \ K(\frac{1 \ mol \ K}{39.10 \ g \ K} )(\frac{6.022 \cdot 10^{23} \ atoms \ K}{1 \ mol \ K} )$ = 5.15797 × 10²³ atoms K

Step 4: Check

We are given 4 sig figs. Follow sig figs and round.

5.15797 × 10²³ atoms K ≈ 5.158 × 10²³ atoms K

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3 years ago

What is the term for the number of protons in the nucleus of each atom of an element? it also indicates the number of electrons

wolverine [178]

Atomic number is the term you are looking for

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3 years ago

What is the total number of valence electrons in the lewis structure of sebr2o?

zloy xaker [14]

Answer:

15.4: Lewis Structures: Counting Valence Electrons

Explanation:

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2 years ago