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Sonbull [250]
3 years ago
13

One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?

Physics
2 answers:
Inessa05 [86]3 years ago
6 0
Mass number = 11 + 7 = 18
erica [24]3 years ago
3 0

Answer:

18

Explanation:

The mass of an isotope is the sum of all the nucleons in that isotope. Nucleons are the protons and neutrons found in the nucleus of that atom.

So the mass = 11 + 7 = 18

It is worth noting that even though isotopes have electrons, we do not ad them them to the mass because their mass is so small and insignificant that we normally ignore it in calculations

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Will mark as brainliest if answered correctly!!!!!!!!!!!!!
Evgen [1.6K]

Answer:

C

Explanation:

Because...

A= Incideant ray

B= Angle of inciderance

<u>C= angle of reflection</u>

D= reflection ray

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3 years ago
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During the first 40 s a truck traveled at a constant speed of 15 m/s. Find the
kotykmax [81]

Answer:

600 m

Explanation:

Distance = speed × time

= (15)(40)

= <u>6</u><u>0</u><u>0</u><u> </u><u>m</u>

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3 years ago
Where can we found solar energy in britain
Mashcka [7]

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There is absolutely enough sunlight in the UK (we get around 60 percent of the sunlight got at the equator) to make putting resources into solar advantageous – as has been exhibited by the development of enormous scale solar tasks in Cornwall and Lincolnshire.

Be that as it may, since the legislature cut its help for the solar industry in 2015, the UK has seen an emotional fall in the rate of take off of solar PV boards. This foolhardy move has additionally activated a large number of occupation misfortunes in the solar industry.

Greenpeace is requiring the English government to desperately audit its help for the solar industry, for the atmosphere and for the effect it has had on the development of clean vitality industry occupations in the UK.

This is not copied and here is proof:

6 0
3 years ago
Identify two similar steps between the scientific method and the engineering design process.
Romashka [77]

Answer:

You can compare and contrast the scientific method to the engineering design process

Explanation:

5 0
3 years ago
In as small room fan of rating 50 watt is used for 10hrs 2bulb of rating 10v are used for 8hrs daily.calculate monthly. electric
worty [1.4K]

Answer:

The electric bill for June is Rs198000

Explanation:

Convert volt to watt, but in order to do so I need to know the amps and since it is not provided I converted if the amps was 1.

I multiple 50 with 10 then  with 30 so I know how much watt the fan takes at June.

Since there are 2 light bulb I multiple 10 with 2 than with 8 than with 30.

15000 watts for the fan,

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add them and then times it by 10.

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3 years ago
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