 # What Does The Atomic Mass Tell You?

## What is the difference between mass number and atomic mass quizlet?

Atomic number is the amount of protons in the nucleus.

The mass number is the total number of protons and neutrons.

The atomic mass measures the total mass of an atom.

The mass number is the total number of protons and neutrons in an isotope..

## What is the average atomic mass mean?

The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope).

## What does the symbol carbon 12 mean?

View this answer. The 12 in carbon-12 is the mass number of the isotope. This means that all atoms of carbon-12 have a mass of 12 atomic mass units. This is calculated…

## Why are atomic masses not whole numbers?

The atomic masses listed in the periodic table are not whole numbers because they are weighted averages of the masses and abundances of all of the…

## How atomic number is determined?

Neutral atoms of each element contain an equal number of protons and electrons. The number of protons determines an element’s atomic number and is used to distinguish one element from another. … Together, the number of protons and the number of neutrons determine an element’s mass number.

## What are the first 30 elements?

Atomic Mass of First 30 ElementsATOMIC NUMBERELEMENTATOMIC MASS1Hydrogen1.0082Helium4.00263Lithium6.944Beryllium9.012226 more rows

## What does the atomic number represent?

In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).

## What three things does the atomic number tell us?

The three main atomic particles are protons, neutrons and electrons. The atomic number of an atom identifies the number of protons in the atom.

## What is the difference between atomic mass and average atomic mass?

Atomic mass is the mass of a specific isotope of an element. Average atomic mass is the weighted average mass of all isotopes of an element.

## Which number is atomic mass?

The atomic mass of a single atom is simply its total mass and is typically expressed in atomic mass units or amu. By definition, an atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu.

## What does the atomic mass tell you quizlet?

The atomic mass tells us the weight of protons and neutrons. … The period number represents how many shells of electrons the atom has.

## What is the difference between atomic mass and relative atomic mass?

Atomic mass (ma) is the mass of a single atom, with unit Da or u (the dalton). … The relative isotopic mass is specifically the ratio of the mass of a single atom to the mass of a unified atomic mass unit. This value, too, is relative, and therefore dimensionless.