Atomic Mass of Elements

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Atomic Mass of First 20 Elements

The atomic mass of a solitary atom is just its absolute mass and regularly expressed in atomic mass units or amu. By the definition, the carbon atom with six neutrons, denoted as carbon-12, has an atomic mass equal to 12 amu. Different atoms don't by and large have round-number atomic masses for reasons that are a little past the extent of this article. All in all, however, an atom's atomic mass will be extremely near its mass number yet will have some deviation in the decimal spots. 


Since an element's isotopes have distinctive atomic masses, researchers may likewise decide the general atomic mass—once in a while called the atomic weight—for an element. The general atomic mass is normal of the atomic masses of the apparent multitude of various isotopes in an example, with every isotope's contribution to the normal controlled by how huge a fraction of the example it makes up. The overall atomic masses that are given in periodic tables like the one for hydrogen are determined for the naturally occurring isotopes of each element, weighted by the weight of those particular isotopes on earth. 


In this article, we will learn about the atomic mass of elements in detail, what is the atomic mass of all elements, and what is the atomic number and atomic mass of elements. Given below is the atomic mass of elements list.

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Atomic Number of Elements from 1 to 30

Let us take a look at what is the atomic mass of elements from 1 to 30.


Atomic Number

Element

Atomic Mass

1

Hydrogen

1.008

2

Helium

4.0026

3

Lithium

6.94

4

Beryllium

9.0122

5

Boron

10.81

6

Carbon

12.011

7

Nitrogen

14.007

8

Oxygen

15.999

9

Fluorine

18.998

10

Neon

20.18

11

Sodium

22.99

12

Magnesium

24.305

13

Aluminium

26.982

14

Silicon

28.085

15

Phosphorus

30.974

16

Sulfur

32.06

17

Chlorine

35.45

18

Argon

39.948

19

Potassium

39.098

20

Calcium

40.078

21

Scandium

44.956

22

Titanium

47.867

23

Vanadium

50.942

24

Chromium

51.996

25

Manganese

54.938

26

Iron

55.845

27

Cobalt

58.933

28

Nickel

58.693

29

Copper

63.546

30

Zinc

65.38


This was the atomic mass of the first 30 elements. Let us now learn the difference between atomic number and atomic mass of elements.


Difference Between the Atomic Number and the Atomic Mass of Elements

Let us now learn about the difference between the atomic number of elements and their atomic mass.


Atomic Mass

Atomic Number

Atomic mass is related to the number of neutrons and protons which are present in the nucleus of an element.

Atomic number refers to the number of protons that are present in the nucleus of an element.

It refers to the average weight of a particular element.

It refers to the total number of nucleons that are present in the atom’s nucleus.

Atomic mass is denoted by the letter A

The letter Z is used for representing the atomic number.

Atomic mass cannot be used for defining the type of element.

Atomic numbers usually help to classify and identify an element.

Atomic mass is also used in the classification of different isotopes of the same element

Only isotopes of an element share the same atomic number.

Atomic mass is always measured using the atomic mass unit (amu).

The atomic number is simply a digit which is used for placing the elements in the periodic table.

FAQ (Frequently Asked Questions)

1. What is the Atomic Mass of the First 20 Elements?

Ans: Given below is the atomic mass number of the first 20 elements.


Atomic Number

Element

Atomic Mass

1

Hydrogen

1.008

2

Helium

4.0026

3

Lithium

6.94

4

Beryllium

9.0122

5

Boron

10.81

6

Carbon

12.011

7

Nitrogen

14.007

8

Oxygen

15.999

9

Fluorine

18.998

10

Neon

20.18

11

Sodium

22.99

12

Magnesium

24.305

13

Aluminium

26.982

14

Silicon

28.085

15

Phosphorus

30.974

16

Sulfur

32.06

17

Chlorine

35.45

18

Argon

39.948

19

Potassium

39.098

20

Calcium

40.078

2. What is the Definition of Atomic Number?

Ans: Indeed, even the proton number is known as the atomic number. A chemical element's atomic no. is characterized as the whole of protons present in the nucleus of that atom of the element. Since neutrons convey no net electrical charge it is the charge number of the nucleus. 


Atomic mass and atomic number may have similarities, however, they are accustomed to uncovering various qualities of elements. As indicated by the definitions given, atomic mass which is additionally called atomic weight is the deliberate complete mass of an element's atom. Though, atomic number is only the absolute number of neutrons and protons in the nucleus of an atom.

3. Define Atomic Mass and Give Examples.

Ans: Atoms are the essential units of matter. They are the littlest segments of a chemical element, which is a substance that can't be separated into easier material. Atoms have explicit properties that will decide their chemical and physical nature. One of these properties is their atomic mass. This video will talk about our atomic mass and its function in science. 


Atomic mass is generally equal to the aggregate of the individual particle masses of an atom. Atoms have three essential segments: protons (emphatically charged particles), neutrons (non-charged particles), and electrons (adversely charged particles). 


Protons and neutrons are the bigger particles and are found in the nucleus, which is the centre of the atom. Atomic mass is commonly determined by including the number of protons and neutrons together, overlooking the electrons on account of their little size. Daltons are the standard units utilized for estimating atomic mass. 

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