All categories

3 years ago

Uranium atoms each have 92 protons. How many protons does each U-238 atom have?

Chemistry

2 answers:

elena-s [515]3 years ago

8 0

Answer: The correct answer is Option A.

Explanation:

Atomic number is defined as the number of protons or electrons that are present in a neutral atom. It is represented by Z.

Atomic number = number of protons = number of electrons

Mass number is defined as the sum of number of protons and neutrons that are present in an atom. It is represented by A.

Mass number = Number of protons + Number of neutrons

We are given an isotopic representation of $_{92}^{238}\textrm{U}$

Number of protons = 92

Mass number = 238

Number of neutrons = 238 - 92 = 146

For every uranium atom, number of protons will be 92

Hence, the correct answer is Option A.

Nesterboy [21]3 years ago

5 0

A.92 all Uranium atoms contain the same amount of protons

You might be interested in

Plsss help!!! ASAP!!!

Verizon [17]

The electronic configuration is for iron (Fe) because if you add all those power up it will give you 26 and it’s the atomic number of Fe

4 0

3 years ago

Consider the elements in the periodic table. The stair-step line between the pink squares and the yellow squares separates the _

photoshop1234 [79]

The choices for this are as follows:

A) gases; solids
B) metals; nonmetals
C) nonmetals; metals
D) reactive; nonreactive

I think the correct answer is option B. The stair-step line between the pink squares and the yellow squares separates the metals from the nonmetals. Hope this helps.

6 0

3 years ago

How has Charles Darwin contributed to the study of evolution?

Lunna [17]

Do you answer is he proposed a genetic relationship between species

6 0

3 years ago

What measures are used to calculate the percent by volume of a solution?

Yuliya22 [10]

Titration is the method used.

4 0

3 years ago

How many total moles of ions are released when the following sample dissolves completely in water? 6.188 x 10 21 formula units o

elixir [45]

Answer:

e. 3.08 x 10⁻² mol of ions.

Explanation:

Every 1.0 mole of any compound contains Avogadro's number of molecules (6.022 x 10²³).

We can get the no. of moles of NiCl₂ using cross multiplication:

1.0 mol NiCl₂ contains → 6.022 x 10²³ molecules.

??? mol NiCl₂ contains → 6.188 x 10²¹ molecules.

∴ The no. of moles of NiCl₂ = (1.0 mol)(6.188 x 10²¹ molecules)/(6.022 x 10²³ molecules) = 1.028 x 10⁻² mol.

NiCl₂ is ionized according to the equation:

NiCl₂ → Ni²⁺ + 2Cl⁻.

Which means that every 1.0 mol of NiCl₂ is ionized to produce 3.0 moles (1.0 mol of Ni²⁺ and 2 moles of Cl⁻).

∴ The total moles of ions are released = 3 x 1.028 x 10⁻² mol = 3.083 x 10⁻² mol of ions.

3 0

3 years ago