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3 years ago

In the ground state, an atom of which element has two valence electrons?

2 answers:

8 0

In the event that you investigate where Chromium is on the intermittent table, it is one electron far from having 5 electrons in its 3d-subshell and a more prominent general strength. Consequently, with a specific end goal to accomplish this more attractive state, one of the 4s electrons is elevated to the 3d sub shell, accomplishing the half-full orbital and bringing about just a single electron staying in the 4s (valence) shell. Copper does this too.

notka56 [123]3 years ago

6 0

in groud state, the atom that has two valence electrons would be: Cr or Chromium The atoms that have two valence electrons are grouped on the second collumn in periodic tables, which is called the Alkaline earth metals. The elements that belonged to this group are: Berrylium, Magnesium, Chromium, Strontium, Barium, and radium.

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The atomic number and the mass number of 18 and 40. Write the information conveyed by this statement.

VashaNatasha [74]

There are 18 protons and electrons and 22 neutrons in the atom

8 0

3 years ago

A solution contains 15 grams of salt per litter of solution. How many grams of salt are in 3.3 litters of solution?

Verizon [17]

49.5g

Explanation:

Mass of salt = 15g

Volume of solution = 1L

Volume of given solution = 3.3L

Unknown:

Mass of salt in the solution = ?

Solution:

Since we have been given the concentration of the salt in the solution, we can use it to solve the problem.

Concentration; 15g/L

Given;

In 1L of the solution we have 15g of salt,

In 3.3L of the solution we will have 3.3 x 15 = 49.5g

The salt is the solute and it represents the dissolved substances.

learn more:

Concentration brainly.com/question/4641902

#learnwithBrainly

7 0

3 years ago

A sealed flask contains 3.82 x 1024 molecules of CO, How many moles of Co, are in the flask?

Lynna [10]

Answer:

3.82 × 1024

= 3911.68

<h3>I hope this helps!</h3>

4 0

2 years ago

Read 2 more answers

In a titration experiment 12.5 ml of 0.500 m h2so4 neutralized 50.0 ml of naoh. the concentration of the naoh solution is ____.

s344n2d4d5 [400]

0.250 mol/L

Step 1. Write the chemical equation

H2SO4 + 2NaOH → Na2SO4 + 2H2O

Step 2. Calculate the moles of H2SO4

Moles of H2SO4 = 12.5 mL H2SO4 × (0.500 mmol H2SO4/1 mL H2SO4)

= 6.25 mmol H2SO4

Step 3. Calculate the moles of NaOH

Moles of NaOH = 6.25 mmol H2SO4 × (2 mmol NaOH/(1 mmol H2SO4)

= 12.5 mmol NaOH

Step 4. Calculate the concentration of the NaOH

[NaOH] = moles/litres = 12.5 mmol/50.0 mL = 0.250 mol/L

4 0

3 years ago

How many of each element are present in this compound 4C4HgCL

frozen [14]

Answer:

Percent Composition of Compounds

The percent composition (by mass) of a compound can be calculated by dividing the mass of each element by the total mass of the compound.

LEARNING OBJECTIVES

Translate between a molecular formula of a compound and its percent composition by mass

The atomic composition of chemical compounds can be described in a variety of ways, including molecular formulas and percent composition.
The percent composition of a compound is calculated with the molecular formula: divide the mass of each element found in one mole of the compound by the total molar mass of the compound.
The percent composition of a compound can be measured experimentally, and these values can be used to determine the empirical formula of a compound.

percent by mass: The fraction, by weight, of one element of a compound.
The atomic composition of chemical compounds can be described using a variety of notations including molecular, empirical, and structural formulas. Another convenient way to describe atomic composition is to examine the percent composition of a compound by mass.

Percent Composition by Mass

Percent composition is calculated from a molecular formula by dividing the mass of a single element in one mole of a compound by the mass of one mole of the entire compound. This value is presented as a percentage.

Explanation:

I hope it's help

5 0

3 years ago