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Stolb23 [73]
3 years ago
14

If an element gains an electron, will it form a positive ion or a negative ion?

Chemistry
1 answer:
yulyashka [42]3 years ago
5 0

Answer:

it form a negative ion because the no. of negative charges exceeds that of the positive charges

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There are three isotopes of X element (X):
Nutka1998 [239]

Answer:

Average atomic mass = 17.5 amu.

Explanation:

Given data:

X-17 isotope = atomic mass17.2 amu, abundance:78.99%

X-18isotope =  atomic mass 18.1 amu, abundance 10.00%

X-19isotope = atomic mass:19.1 amu, abundance: 11.01%

Average atomic mass of X = ?

Solution:

Average atomic mass  = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass)  / 100

Average atomic mass  = (78.99×17.2)+(10.00×18.1) +(11.01+ 19.1) /100

Average atomic mass =  1358.628 + 181 +210.291 / 100

Average atomic mass  = 1749.919 / 100

Average atomic mass = 17.5 amu.

8 0
3 years ago
When performing your experiment, you add your first drop of oleic acid/benzene solution, and a lens forms immediately. what is w
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7 0
3 years ago
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What are some examples of properties scientists use to describe matter?
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Answer:

Physical properties are used to observe and describe matter. Physical properties can be observed or measured without changing the composition of matter. These are properties such as mass, weight, volume, and density.

4 0
2 years ago
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Why is the net charge of a neutral atom zero?
nikitadnepr [17]

Answer:

Explanation:

The positive (protons) and negative (electrons) charges balance each other in a neutral atom, which has a net zero charge. Because protons and neutrons each have a mass of 1, the mass of an atom is equal to the number of protons and neutrons of that atom.

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How did Neils Bohr change the model of the atom
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Bohr changed the model of the atom by proposing that electrons travelled in circular orbits with specific energy levels.
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