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3 years ago

What is the most complete answer below about the information, found about the element uranium in the periodic table

Chemistry

1 answer:

jonny [76]3 years ago

6 0

Answer:

92 is that atomic number and 238.03 is the atomic mass number

Explanation:

The structure of the atom is given as:

⁹²₂₃₈.₀₃U

The number 92 is the atomic number of the atom.

The atomic number is the number of protons within an atom. This number defines the nature and type of atom that we have.

238.03 is the atomic mass number;

The is the number of protons and neutrons within an atom. It is typically the mass of nucleus.

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The density of ethanol is 0.789 g/mL. If you need 460.0 g of ethanol for an experiment, how many milliliters would you measure o

4vir4ik [10]

Answer:

The volume is 583.02 mL

Explanation:

Given that the density is:-

$\rho=0.789\ g/mL$

The mass, $m=460.0\ g$

The expression for the calculation of density is shown below as:-

$\rho=\frac{m}{V}$

Using the above expression to calculate the volume as:-

$V=\frac{m}{\rho}$

Applying the values to calculate the volume as:-

$V=\frac{460.0\ g}{0.789\ g/mL}=583.02\ mL$

<u>The volume is 583.02 mL.</u>

3 0

4 years ago

What would be considered the reactant(s) in H2 + O2 <-> H2O

jeka94

Answer:

H2+ 02

Explanation:

becuase those 2 are at the beginning of the equation and in front of the equilibrium sign :)

6 0

4 years ago

Uranium-238 undergoes radioactive decay according to the incomplete below. 238

Darina [25.2K]

The decay product represented by X : Thorium (Th) : ²³⁴₉₀Th

<h3>Further explanation</h3>

Given

Decay reaction

²³⁸₉₂U ⇒ ⁴₂He + X

Required

The decay product

Solution

Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,

alpha α particles ₂He⁴
beta β ₋₁e⁰ particles
gamma particles ₀γ⁰
positron particles ₁e⁰
neutron ₀n¹

In a decay reaction, <em>the sum of the mass number and atomic number of the elements in the reactants and products must be the same</em>

So the mass number of the element X = 238 - 4 = 234

Atomic number of the element X = 92 - 2 = 90

If we look at the periodic system, then the element with atomic number 90 is Thorium (Th)

8 0

3 years ago

A salad including lettuce, tomatoes, and onions would be classified as a

Whitepunk [10]

Answer:

C)Mixtured

Explanation:

I know the answer

4 0

3 years ago

New cells are created from A) matter. B) energy. C) other cells. D) non-living matter.

Leokris [45]

Basically other cells

3 0

3 years ago

Read 2 more answers