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Vedmedyk [2.9K]
2 years ago
6

What is the relationship between atomic number and an the atom's identity?

Chemistry
1 answer:
kramer2 years ago
3 0
The atomic number represents the number or protons in the nucleus of the atoms of an element. Every element has a specific number of protons, and only atoms of the same element have the same number of protons. For example, carbon, C, has an atomic number of 6. All atoms of carbon have 6 protons in their nuclei.
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the element carbon has two common isotopes: C-12 (12 U) AND C-13 (13.003355 U). IF THE AVERAGE ATOMIC MASS OF CARBON IS 12.0107
oksian1 [2.3K]

Answer:

The percent isotopic abundance of C- 12 is 98.93 %

The percent isotopic abundance of C- 13 is 1.07 %

Explanation:

we know there are two naturally occurring isotopes of carbon, C-12 (12u)  and C-13 (13.003355)

First of all we will set the fraction for both isotopes

X for the isotopes having mass 13.003355

1-x for isotopes having mass 12

The average atomic mass of carbon is 12.0107

we will use the following equation,

13.003355x + 12 (1-x) = 12.0107

13.003355x + 12 - 12x = 12.0107

13.003355x- 12x = 12.0107 -12

1.003355x = 0.0107

x= 0.0107/1.003355

x= 0.0107

0.0107 × 100 = 1.07 %

1.07 % is abundance of C-13 because we solve the fraction x.

now we will calculate the abundance of C-12.

(1-x)

1-0.0107 =0.9893

0.9893 × 100= 98.93 %

98.93 % for C-12.

7 0
3 years ago
Who discovered penicillin and why were chemist important in turning penicillin into a widely used life-saving medicine
Deffense [45]
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3 years ago
A car travels 200 miles in 4 hours calculate the cars speed
Vaselesa [24]

Answer:

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Explanation:

To figure out how many miles per hour this car is going, we divide the distance traveled by the time it took.

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Consider the atom with the chemical symbol Ru.
Vinil7 [7]

Answer: 97

Explanation:

The element Ru is <u>Ruthenium</u> which has <u>44 protons</u>.

In this case, our atom is an isotope with <u>53 neutrons</u>.

With this information, we can use the mass number formula to find this atom's mass number.

mass number = protons + neutrons

mass number = <u>44 protons</u> + <u>53 neutrons</u>

mass number = <u>97</u>

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