CHEMISTRY HIGH SCHOOL

NEED HELP!!!!!!1s² 2s² 2p⁶ 3s² 3p⁵ is the electron configuration for which element? *

fluorine
chlorine
sulfur
bromine

Answers

Answer 1
Answer:

1s² 2s² 2p⁶ 3s² 3p⁵ is the electron configuration for B)chlorine.

What are the 4 types of electron configuration?

The 4 special types of orbitals (s,p,d, and f) have distinctive shapes, and one orbital can hold a most of twoelectrons. The p, d, and f orbitals have different sublevels, accordingly can keep extraelectrons. As stated, the electronconfiguration of each detail is precise to its position on the periodic table.

In atomic physics and quantumchemistry, the electronconfiguration is the distribution of electrons of an atom or molecule (or different bodily structure) in atomic or molecularorbitals.

Learn more about electron configuration here: brainly.com/question/11316046

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Answer 2
Answer: Chlorine.

If you search Google images for "Aufbau principle periodic table," you'll find some handy diagrams that will make it much easier to determine an element based on its electron configuration. Determine the number of electrons in the last part of the configuration (in this case, 5), locate that group on the Aufbau periodic table diagram, then count that number from left to right within that group. In this case, within the "3p" portion of the Periodic table, count to 5 and you'll find Chlorine as the answer.

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Dalton’s Law CalculationA mixture of H₂, N₂ and Ar gases is present in a steel cylinder. The total pressure within the cylinder is 675 mm Hg and the partial pressures of N₂ and Ar are, respectively, 354 mm Hg and 235 mm Hg. If CO₂ gas is added to the mixture, at constant temperature, until the total pressure reaches 842 mm Hg, what is the partial pressure, in mm Hg, of the following?A) CO₂, 167 B) N₂, 354 C) Ar, 235 D) H₂, 8629

A solution of ammonia and water contains 1.80×1025 water molecules and 7.00×1024 ammonia molecules. How many total hydrogen atoms are in this solution?

Answers

Answer:

6.40x10²⁵ hydrogen atoms

Explanation:

The solution contains:

  • 1.80x10²⁵ water molecules (H₂O)
  • 7.00x10²⁴ ammonia molecules (NH₄)

We need to calculate the total of hydrogen atoms (H) in the solution.

  • Each water molecule (H₂O) has 2 hydrogen atoms
  • Each ammonia molecule (NH₄) has 4 hydrogen atoms

Lets now calculate the number of hydrogen atoms in the solution:

total H atoms = (H atoms in water molecules) + (H atoms in ammonia molecules)

total H atoms = (2 x 1.80x10²⁵) + (4 x 7.00x10²⁴) =

total H atoms = 3.60x10²⁵ + 2.80x10²⁵ = 6.40x10²⁵
1 water molecule contains 2H atoms H atoms in 4.20*10^25 water molecules = 8.4*10^25 H atoms 1 NH3 molecule contains 3 H atoms H atoms in 6.00*10^24 NH3 atoms = 3*6.00*10^24 = 1.8*10^16 H atoms.

Total H atoms = 8.4*10^25 + 1.8*10^25 = 1.02*10^16 H atoms

19.B is the chemical symbol of which element? Boron
Boring
Balkite
Beryllium

20.Zinc (Zn) has an atomic number of 30 and an atomic mass of 65. How many neutrons does a stable atom of Zn have?

30
35
60
95

Answers

Number 1 is..Boron 
Number 2 is ..35

How many atoms are in 11.9 moles of chromium?

Answers

Answer:

7,16.10^(24)

Explanation:

We know that in 1 mole of any substances there are 6,02. 10^(23) atoms

This number (6,02. 10^(23)) is a constant that is known as the avogadros number

if we know how many atoms are in a mole of chromium to calculate how many there are in 11.9 moles we apply a simple rule of three

1 mol Cr\longrightarrow 6,02.10^(23) atoms\n 11.9 moles Cr\longrightarrow x\nx=((11.9)(6,02.10^(23)))/(1)\n x= 7,16.10^(24) atoms

In 11.9 moles of chrome there are 7,16.10^(24) atoms
Use the following equation:
Given # of moles *  molar mass (g) per mol = Mass (g)
This gives us 11.9 x  51.9962 (g) per mol.

618.75 moles

A(n) _______________ compound is a group of atoms held together by chemical bonds.a. protonic
c. molecular
b. elemental
d. radial

Answers

is molecule an answer? It wouldn't let me see all the answers. if it is, molecule is the correct answer. they are held together by a covalent bond, I believe.

Answer:

c. molecular

Explanation:

How many molecules is .360 mol of water

Answers

2.168 x 10²³ is the answer :D

How does thermal energy affect the three states of matter??

Answers

An increase in thermal energy, changes the state of matter from solid to liquid to gas.
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