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3 years ago

How many electrons are in the lowest occupied energy level in a Group 6A element?

Chemistry

2 answers:

zavuch27 [327]3 years ago

5 0

Answer:

Option a. 2

Explanation:

Thinking process:

The electron configuration of an atom always ensures that the lowest level orbital is filled first. The orbitals come in the different sizes and shapes. The first energy levels are made of the s orbitals. These hold two electrons. Next, the p orbitals hold 8 electrons. These are made of the s and p orbital. Then, the next level holds 18 electrons made up of the s, p, and d orbitals. Finally, the next level hold 32 electrons made up of s, p, d, and f orbitals.

kolbaska11 [484]3 years ago

4 0

Answer:

Explanation:

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How many atoms are in 57.5 liters of xenon gas at STP

TiliK225 [7]

Answer:

1.55 × 10²⁴ atoms Xe

General Formulas and Concepts:

Atomic Structure

Reading a Periodic Table
Moles
STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry

Using Dimensional Analysis

Explanation:

Step 1: Define

[Given] 57.5 L Xe at STP

[Solve] atoms Xe

Step 2: Identify Conversions

[STP] 22.4 L = 1 mol

Avogadro's Number

Step 3: Convert

[DA] Set up: $\displaystyle 57.5 \ L \ Xe(\frac{1 \ mol \ Xe}{22.4 \ L \ Xe})(\frac{6.022 \cdot 10^{23} \ atoms \ Xe}{1 \ mol \ Xe})$
[DA] Divide/Multiply [Cancel out units]: $\displaystyle 1.54583 \cdot 10^{24} \ atoms \ Xe$

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

1.54583 × 10²⁴ atoms Xe ≈ 1.55 × 10²⁴ atoms Xe

4 0

3 years ago

Xbox or ps4? haha have a. Good ond

bekas [8.4K]

Answer:

I play none but If I did I would choose Xbox

btw, thank you

7 0

3 years ago

The average rate of consumption of br− is 1.86×10−4 m/s over the first two minutes. what is the average rate of formation of br2

Scorpion4ik [409]

By considering the reaction equation is:
5Br(aq)+BrO3(aq)+6H(aq)= 3Br2(aq)+3H2O(l)
when the average rate of consumption of Br = 1.86x10^-4 m/s
So from the reaction equation
5Br → 3Br2 when we measure the average rate of formation (X) during the same interval So,
∴ 1.86x10^-4/5 = X / 3
∴X = 1.1 x 10^-4 m/s
∴the average rate of formation of Br2 = 1.1x10^-4 m/s

7 0

3 years ago

Describe the difference between Al3+ and N3-

wariber [46]

Al3+ is cation due to its positve charge
N3- is an anion due to its negative charge

4 0

4 years ago

The molar mass of copper(II) chloride (CuCl2) is 134.45 g/mol. How many formula units of CuCl2 are present in 17.6 g of CuCl2? 7

Sedaia [141]

7.88 10^22 formula units

5 0

4 years ago

Read 2 more answers