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ExtremeBDS [4]
4 years ago
8

The number of neutrons in the nucleus of an atom can be determined by

Chemistry
1 answer:
Tcecarenko [31]4 years ago
5 0
Since atomic mass is protons + neutrons, if you subtract atomic mass - protons, you get neutrons.
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The model below shows an atom of an element. What is the atomic number of this atom? 6 8 9 16
barxatty [35]

A picture would be nice

The question asks that theres a model down below can you add the picture just go to the bottom of your question is should say Edit press that and it should let you edit and then add the picture

6 0
3 years ago
Read 2 more answers
How many moles are in 87.62 grams of strontium?
Zielflug [23.3K]

Explanation:

it's one mole because the atomic mass is treated as molar mass and the atomic mass of strontium is 87.62 grams/mol

5 0
3 years ago
Draw a Lewis structure for BCl3 and answer the following questions based on your drawing.
Georgia [21]

Answer:

1. For the central boron atom:

A. The number of lone pairs = 0.

B. The number of single bonds = 3.

C. The number of double bonds = 0.

2. The central boron atom B. Has an incomplete octet.

Explanation:

Hello,

In this case, as shown on the attached picture containing the required Lewis structure of boron chloride, we can see that:

1. For the central boron atom:

A. The number of lone pairs = 0 since all the three valance electrons are bonded with the chlorine atoms.

B. The number of single bonds = 3 as each chlorine atom needs only one bond to obey the octet.

C. The number of double bonds = 0 considering the previous explanation.

2. The central boron atom B. Has an incomplete octet since it reaches six electrons only from its initial three and other three provided by the three chlorine atoms.

Regards.

4 0
4 years ago
How many moles are in 4.818 x 1024 chloride ions
erastovalidia [21]

Answer:

<h3>The answer is 8.00 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4.818 \times  {10}^{24} }{6.02 \times  {10}^{23} }  \\  = 8.00332225...

We have the final answer as

<h3>8.00 moles</h3>

Hope this helps you

4 0
3 years ago
How do you know if an element is a metal or nonmetal from looking at the periodic table
Mice21 [21]
It will have metal in it . The other would not. It’s actually very simple
7 0
3 years ago
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