According to the periodic table, the neutral atom of what element has 4 protons,5 neutrons,and 4 electrons

1 answer:

7 0

Since it has a 4 protons and 5 neutrons, it has a mass number of 9. The number of electrons is irrelevant for this question. Atomic number is the number of protons, so it is 4. So it is Beryllium

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Which substance contains only 1 kind of atom

Nataliya [291]

Elements are substances that contain only 1 kind of atom.

8 0

3 years ago

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Element X reacts with chlorine to form an ionic compound that has the formula XCl₂. To which group on the Periodic Table could e

marishachu [46]

Answer:

Group 2 is the correct answer.

Explanation:

Chlorine has a charge -1. It means that X is +2 so that the formula is XCl2.

4 0

3 years ago

2.what is the purpose of the sodium sulfate? (1 pt) why did you rinse the sodium sulfate with an additional portion of methylene

suter [353]

To ensure that the 9-Fluorenone was totally dry, it had to be washed with methylene chloride. To make sure that methylene chloride is present in a pure solution, sodium sulfate binds to water and precipitates.

<h3>What is the purpose of the sodium sulfate?</h3>

Although it has numerous additional uses, sodium sulfate is primarily employed in the production of detergents and in the Kraft process of paper pulping.
The decahydrate's natural mineral form, mirabilite, accounts for about half of the world's output, with the other half coming from chemical byproducts. Sodium sulfate was used as a drying, isolating, and anhydrous salt for the 9-fluorenone.
To make sure that methylene chloride is present in a pure solution, sodium sulfate binds to water and precipitates.
The sodium salt of sulfuric acid is known as sodium sulfate. Na2SO4 is the chemical formula for sodium sulfate. The mineral thenardite, which is also known as anhydrous sulfate, is described as a white, crystalline solid, whereas the decahydrate Na2SO4. 10H2O is also known as Glauber's salt or the mirabilis salt.

To know more about sodium sulfate, refer:

brainly.com/question/23509646

#SPJ4

4 0

1 year ago

What is the Celsius temperature of 1 mole of a gas that has an average kinetic energy of 4,290 joules?

timofeeve [1]

Well the the answer is 70.8c but if you round it up it is 71c which I choice and got it correct so the answer is 71c

5 0

3 years ago

Consider the reaction 2 al + Fe2O3 to 2Fe + Al2O3. If 60.0g of Al is reacted with excess Fe2O3, determine the amount (in moles)

olganol [36]

The amount of Al2O3 in moles= 1.11 moles while in grams = 113.22 grams

calculation

2 Al + Fe2O3 → 2Fe + Al2O3

step 1: find the moles of Al by use of moles= mass/molar mass formula

= 60.0/27= 2.22 moles

Step 2: use the mole ratio to determine the moles of Al2O3.

The mole ratio of Al : Al2O3 is 2: 1 therefore the moles of Al2O3= 2.22/2=1.11 moles

Step 3: finds the mass of Al2O3 by us of mass= moles x molar mass formula.

The molar mass of Al2O3 = (2x27) +( 16 x3) = 102 g/mol

mass is therefore= 102 g/mol x 1.11= 113.22 grams

7 0

3 years ago