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Tasya [4]
3 years ago
8

If Aluminum has 13 protons, 14 neutrons and 13 electrons, what is its atomic mass? 26 14 27 13

Physics
2 answers:
Ilya [14]3 years ago
8 0

<u>Answer:</u>

<em>27 is its atomic mass</em>

<u>Explanation:</u>

Isotope in chemistry refers to a similar variant of same chemical element where they only differ in number of neutrons <em>while the number of protons remains the same. </em>

Since the <em>aluminum isotope consists 13 protons and 14 neutrons, the mass number of the aluminum isotope </em>would be equal to the sum of number of protons and neutrons present.

<em>As there are 13 protons and 14 neutrons so the mass number will be equal to 27.</em>

Anastaziya [24]3 years ago
5 0

Answer:

R: 27 u

ou 27g/mol

Explanation:

A massa atômica de um elemento é dada pela soma do número atômico (número de protons) com o número de neutrons. Assim:

A= 13+14 = 27

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Which method is not a technique currently used by ocean scientists to map the topography of the ocean floor?
raketka [301]

Answer:

Magnetometer

Explanation:

Magnetometer technique is not using by scientists for studying the ocean floor.The scientists currently is using SONAR ( sound navigation and ragging) technique for studying the ocean floor.SONAR is used sound waves sound waves for studying the ocean floor or we can say that SONAR is based on sound propagation.

Therefore answer is Magnetometer

4 0
3 years ago
What is the medium the energy in the slinky wave travels through?
vlabodo [156]

Answer:

The metal coil of the slinky

Explanation:

The wave travels on the actual slinky which we see deforming as the wave goes through.

6 0
2 years ago
Read 2 more answers
The metric unit of force is the
grandymaker [24]

The unit of force is the 'Newton'.

1 newton is the force that accelerates 1 kilogram of mass
at the rate of 1 meter per second-squared.

                   1 N  =  1 kg-m/s²

-- A force of 1 pound is about  4.448 newtons.

-- A force of 1 newton is about  3.6 ounces.

6 0
3 years ago
Read 2 more answers
Atomic nuclei of almost all elements consist of
wolverine [178]
<h2>Answer: protons and neutrons. </h2>

The atomic nuclei of almost all elements consist of protons and neutrons.

The nucleus of an atom has very small dimensions. However, it <u>occupies its central part and concentrates more than 99% of its total mass. </u>

It is in the nucleus that the protons (positive charge) and neutrons (neutral charge) are found.

4 0
3 years ago
A 4.30 g bullet moving at 943 m/s strikes a 730 g wooden block at rest on a frictionless surface. The bullet emerges, traveling
Ymorist [56]

Answer:

(a)2.7 m/s

(b) 5.52 m/s

Explanation:

The total of the system would be conserved as no external force is acting on it.

Initial momentum = final momentum

⇒(4.30 g × 943 m/s) + (730 g × 0) = (4.30 g × 484 m/s) + (730 g × v)

⇒ 730 ×v = (4054.9 - 2081.2) =1973.7

⇒v=2.7 m/s

Thus, the resulting speed of the block is 2.7 m/s.

(b) since, the momentum is conserved, the speed of the bullet-block center of mass would be constant.

V_{COM} = \frac{m_b}{m_b+m_{bl}}v_{bi}=\frac{4.30}{4.30+730}\times 943 m/s = 5.52 m/s

Thus, the speed of the bullet-block center of mass is 5.52 m/s.

4 0
3 years ago
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