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3 years ago

Which of the following statements is not accurate in regard to the first four energy levels?

Chemistry

1 answer:

seropon [69]3 years ago

3 0

Answer:

D) False

Explanation:

A) True

The third energy level with principal quantum number n =3 will have s,p,d orbitals where the s, p ,d orbitals can accommodate a maximum of 2,6 and 8 electrons respectively. Therefore, total electron count = 18

B) True

The fourth energy level corresponds to n = 4 with s,p,d and f orbitals

C) True

A given orbital can accommodate a maximum of 2 electrons, one in the spin up and the other in a spin down orientation

D) False

The first energy level has n =1 with only s orbital

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A sample of 1.00 moles of oxygen at 50°C and 98.6 kPa, occupies what volume?

enyata [817]

Answer:

27.22 dm³

Explanation:

Given parameters:

number of moles = 1 mole

temperature= 50°C, in K gives 50+ 273 = 323K

Pressure= 98.6kpa in ATM, gives 0.973 ATM

Solution:

Since the unknown is the volume of gas, applying the ideal gas law will be appropriate in solving this problem.

The ideal gas law is mathematically expressed as,

Pv=nRT

where P is the pressure of the gas

V is the volume

n is the number of moles

R is the gas constant

T is the temperature

Input the parameters and solve for V,

0.973 x V = 1 x 0.082 x 323

V= 27.22 dm³

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3 years ago

The time required for one-half of the atoms from a sample of a radioactive substance to decay is called its _____.

Orlov [11]

A.) half - life of a radioactive substance is defined as the time during which concentration of the substance becomes half the initial value.

8 0

3 years ago

Read 2 more answers

What is the main difference between an isotope and an ion

eimsori [14]

An isotope is the vary of neutrons in an element, causing its atomic mass to change. While an ion is a charged atom that bonds to be stable.

6 0

3 years ago

Which describes the products created from fission reactions? Question 3 options:

Ipatiy [6.2K]

Answer: The correct answer is option A.

Explanation:

Nuclear fission reactions are a type of nuclear reactions in which larger nuclei breaks apart into two or more smaller fragment releasing alpha, gamma of beta particles.

There are 3 types of particles that can be released during this process:

1. Alpha particles: These particles are released when a nuclei undergoes alpha-decay process.

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha$

2. Beta particles: These particles are released when a nuclei undergoes beta-minus decay process.

$_Z^A\textrm{X}\rightarrow _{Z+1}^{A}\textrm{Y}+_{-1}^0\beta$

3. Gamma radiations: these radiations are released when an unstable nuclei gives off excess energy by a process of spontaneous electromagnetic process.

$_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma$