1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
xxTIMURxx [149]
3 years ago
10

Nitrogen - 14.0067

Chemistry
1 answer:
alina1380 [7]3 years ago
3 0

Answer:

potasium to erbium

Explanation:

You might be interested in
Write the isotopic symbol for the following (show your work) a) An isotope of iodine whose atoms have 78 neutrons b) An isotope
morpeh [17]

<u>Answer:</u>

<u>For a:</u> The isotopic representation of iodine is _{53}^{131}\textrm{I}

<u>For b:</u> The isotopic representation of cesium is _{55}^{137}\textrm{Cs}

<u>For c:</u> The isotopic representation of strontium is _{38}^{52}\textrm{Sr}

<u>Explanation:</u>

The isotopic representation of an atom is: _Z^A\textrm{X}

where,

Z = Atomic number of the atom

A = Mass number of the atom

X = Symbol of the atom

  • <u>For a:</u>

We are given:

Number of neutrons = 78

Atomic number of iodine = 53 = Number of protons

Mass number = 53 + 78 = 131

Thus, the isotopic representation of iodine is _{53}^{131}\textrm{I}

  • <u>For b:</u>

We are given:

Number of neutrons = 82

Atomic number of cesium = 55 = Number of protons

Mass number = 55 + 82 = 137

Thus, the isotopic representation of cesium is _{55}^{137}\textrm{Cs}

  • <u>For c:</u>

We are given:

Number of neutrons = 52

Atomic number of strontium = 38 = Number of protons

Mass number = 38 + 52 = 90

Thus, the isotopic representation of strontium is _{38}^{52}\textrm{Sr}

3 0
3 years ago
What is the energy of an electron in the third energy level of hydrogen?
Roman55 [17]

Answer:

Electrons in a hydrogen atom must be in one of the allowed energy levels. If an electron is in the first energy level, it must have exactly -13.6 eV of energy.

...

Energy Levels of Electrons.

Energy Level Energy

1 -13.6 eV

2 -3.4 eV

3 -1.51 eV

4 -.85 eV

4 0
3 years ago
The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of 58.1 grams in one mole. How
labwork [276]

First convert grams to moles using molar mass of butane that is 58.1 g

3.50g C4H10 x (1 mol C4H10)/(58.1g C4H10) = 0.06024 mol C4H10 <span>

<span>Now convert moles to molecules by using Avogadro’s number

0.06024 mol C4H10 x (6.022x10^23 molecules C4H10)/(1 mol C4H10) = 3.627x10^22 molecules C4H10 

And there are 4 carbon atoms in 1 molecule of butane, so use the following ratio: 

3.627 x 10^22 molecules C4H10 x (4 atoms C)/(1 molecule C4H10) 
<span>= 1.45 x 10^23 atoms of carbon are present</span></span></span>

7 0
3 years ago
Read 2 more answers
Why is the Pacific Northwest receives so much precipitation?
lyudmila [28]

The Cascades rain shadow can be described as such: ocean-influenced moist air masses are forced to rise when they meet the tall moun- tains. The rising air cools, condenses, and the moisture falls as precipitation. On the leeward (dry) side of the mountain, the now dry air warms and sinks.

4 0
3 years ago
Read 2 more answers
Imagine a large compass extending out from center of the earth it set messured 90° One point touches the equator where does the
alexandr402 [8]
The exact opposite end of the earth or 180degrees
6 0
3 years ago
Other questions:
  • During the summer after your first year at Carnegie Mellon, you are lucky enough to get a job making coffee at Starbucks, but yo
    6·1 answer
  • Why will a toy train remain still if you push on the engine with
    6·1 answer
  • "You measure 48.9 mL of a solution of sulfuric acid with an unknown concentration, and carefully titrate this solution using a 1
    5·1 answer
  • Bromophenol blue is the indicator used in detecting the endpoint for the antacid analysis in this experiment. what is the expect
    12·1 answer
  • Al + 02 --&gt; Al 2 0 3
    5·1 answer
  • A space shuttle is used for space------
    8·2 answers
  • How many sig figs are in the measurment 10010m
    5·1 answer
  • Use the data in the table to answer the following question.
    10·1 answer
  • The function of the heat exchanger in a nuclear reactor is to...
    5·1 answer
  • Select the answer for this number showing three significant figures. Remember to round if necessary. 0.566 m 0.600 m 0.570 m 0.5
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!