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lions [1.4K]
11 months ago
12

What is the ATOMIC NUMBER for an element with 5 protons, 6 neutrons and 2 electrons?

Chemistry
1 answer:
Ronch [10]11 months ago
8 0

The element's Atomic number , which has 5 protons, 6 neutrons, and 2 electrons (the atomic number is the number of protons) =  5

<h3>What in an atomic number?</h3>

the number assigned to a chemical element according to its atomic number in the periodic system, which places the elements in ascending order of the number of protons in their nuclei. As a result, the atomic number is also the number of protons, which in a neutral atom is always equal to the amount of electrons.

<h3>Briefing:</h3>

Protons and neutrons are added to determine an element's mass number. The only number that may change while maintaining the identity of an element is the number of neutrons for that element (because the atomic number is the number of protons).

Mass number = protons + neutrons

<h3>According to the given data;</h3>

Given:

5 protons,

6 neutrons

2 electrons

Atomic number = ?

We know that the Mass number = protons + neutrons:

Mass number = protons + neutrons

Mass number = 5 + 6:

Mass number = 11

The element's Atomic number , which has 5 protons, 6 neutrons, and 2 electrons (the atomic number is the number of protons) =  5.

To know more about Atomic number  visit:

brainly.com/question/16858932

#SPJ10

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The attachment below is the question:
irakobra [83]

Answer:

gold

Explanation:

to work out density you do mass which is 38.6 divided by volume which is 2cm cubed and you get the answer of 19.3 so it is gold.

7 0
2 years ago
How many moles of H2 can be made from complete reaction of 3.0 moles of Al?
tresset_1 [31]

Answer: 4.5 moles of H_{2} can be made from complete reaction of 3.0 moles of Al.

Explanation:

The given reaction equation is as follows.

2Al + 6HCl \rightarrow 2AlCl_{3} + 3H_{2}

This shows that 2 moles of Al reacts with 6 moles of HCl. So, the amount of HCl required to react with 1 mole Al is three times the amount of HCl.

Therefore, 3 moles of Al will react with 9 moles of HCl to give 3 moles of AlCl_{3} and \frac{9}{2} moles of H_{2}.

The reaction equation now will be as follows.

3Al + 9HCl \rightarrow 3AlCl_{3} + \frac{9}{2}H_{2}

The moles \frac{9}{2} can also be written as 4.5 moles.

Thus, we can conclude that 4.5 moles of H_{2} can be made from complete reaction of 3.0 moles of Al.

6 0
2 years ago
The name for the following formula C9H18 should be
Elza [17]

Answer:

cyclononane C9H18 nonane

7 0
3 years ago
IM JUST GIVING AWAY POINTS!!!!!!
myrzilka [38]
2.5128e10 is the answer
6 0
2 years ago
Read 2 more answers
The pOH of a solution is 9.21. Calculate the hydrogen ion concentration of the solution. Be sure to report your answer to the co
11Alexandr11 [23.1K]

Answer:

[OH-] = 6.17 *10^-10

Explanation:

Step 1: Data given

pOH = 9.21

Step 2: Calculate [OH-]

pOH = -log [OH-] = 9.21

[OH-] = 10^-9.21

[OH-] = 6.17 *10^-10

Step 3: Check if it's correct

pOH + pH = 14

[H+]*[OH-] = 10^-14

pH = 14 - 9.21 = 4.79

[H+] = 10^-4.79

[H+] = 1.62 *10^-5

6.17 * 10^-10 * 1.62 * 10^-5 = 1* 10^-14

3 0
2 years ago
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