The atomic mass is a measure of _____.protons plus neutronsatomic energycharge

Chemistry

2 answers:

Trava [24]3 years ago

8 0

The atomic mass of an atom is the sum of the protons plus neutrons it has.

Phantasy [73]3 years ago

6 0

Answer & explanation:

The atomic mass of the atom is expressed in u. Indicates how many times the mass of the atom is greater than 1/12 of the mass of the carbon atom (A = 12).

When we measure a quantity, we compare it with another as a reference. To measure the mass of our body we use the kilogram (kg) as the standard unit. If the person has a mass of 80kg it means that his mass is 80 times greater than the mass of 1kg.

Chemistry, in practice, is not interested in knowing the mass of an isolated atom, but for science it is important to know the mass of atoms compared to the mass of another atom taken as standard. Carbon was then the element that has its standardized mass (A = 12).

The mass of an atom is expressed by employing a very small unit called the atomic mass unit (u). When the mass of an element X is stated to be 24u, it means that its mass is 24 times greater than the 1/12 mass of the carbon atom (A = 12). In other words, the atomic mass of element X is twice the atomic mass of carbon.

You might be interested in

La luna es materia? ayuda pisos es para yaaaaaaa!! ;)

Valentin [98]

Answer:

La Luna ? Deberia ser materia

Explanation:

6 0

3 years ago

How are electrons excited in element?

sineoko [7]

Answer:

By absorbing energy electron is jump into higher energy level. This is called excitation.

Explanation:

The electron is jumped into higher level and back into lower level by absorbing and releasing the energy.

The process is called excitation and de-excitation.

Excitation:

When the energy is provided to the atom the electrons by absorbing the energy jump to the higher energy levels. This process is called excitation. The amount of energy absorbed by the electron is exactly equal to the energy difference of orbits. For example if electron jumped from K to L it must absorbed the energy which is equal the energy difference of these two level. The excited electron thus move back to lower energy level which is K by releasing the energy.

De-excitation:

When the excited electron fall back to the lower energy levels the energy is released in the form of radiations. this energy is exactly equal to the energy difference between the orbits. The characteristics bright colors are due to the these emitted radiations. These emitted radiations can be seen if they are fall in the visible region of spectrum.

4 0

3 years ago

A slender uniform rod 100.00 cm long is used as a meter stick. two parallel axes that are perpendicular to the rod are considere

kvv77 [185]

Refer to the diagram shown below.

The second axis is at the centroid of the rod.
The length of the rod is L = 100 cm = 1 m

The first axis is located at 20 cm = 0.2 m from the centroid.
Let m = the mass of the rod.

The moment of inertia about the centroid (the 2nd axis) is
$I_{g} = \frac{mL^{2}}{12} = (m \, kg) \frac{(1 \, m)^{2}}{12} = \frac{m}{12} \, kg-m^{2}$

According to the parallel axis theorem, the moment of inertia about the first axis is
$I_{1} = I_{g} + (m \, kg)(0.2 m)^{2} \\ I_{1} = \frac{m}{12}+ 0.04m = 0.1233m \, kg-m^{2}$

The ratio of the moment of inertia through the 2nd axis (centroid) to that through the 1st axis is
$\frac{I_{g}}{I_{1}} = \frac{0.0833m}{0.1233m} =0.6756$

Answer: 0.676